diff --git a/.idea/misc.xml b/.idea/misc.xml
index b80d65b..ee60ddf 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -23,6 +23,7 @@
     <cargoProject FILE="$PROJECT_DIR$/minigrep/Cargo.toml" />
     <cargoProject FILE="$PROJECT_DIR$/closures/Cargo.toml" />
     <cargoProject FILE="$PROJECT_DIR$/minigrep_v2/Cargo.toml" />
+    <cargoProject FILE="$PROJECT_DIR$/add/Cargo.toml" />
   </component>
   <component name="ComposerJsonPluginSettings">
     <unboundedVersionInspectionSettings>
diff --git a/.idea/rust.iml b/.idea/rust.iml
index 3f12527..3d5de12 100644
--- a/.idea/rust.iml
+++ b/.idea/rust.iml
@@ -90,6 +90,16 @@
       <sourceFolder url="file://$MODULE_DIR$/minigrep_v2/examples" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/minigrep_v2/tests" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/minigrep_v2/benches" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/add/adder/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/add/adder/examples" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/add/adder/tests" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/add/adder/benches" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/add/add-one/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/add/add-one/examples" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/add/add-one/tests" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/add/add-one/benches" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/add/add-one/target" />
+      <excludeFolder url="file://$MODULE_DIR$/add/adder/target" />
       <excludeFolder url="file://$MODULE_DIR$/adder/target" />
       <excludeFolder url="file://$MODULE_DIR$/branches/target" />
       <excludeFolder url="file://$MODULE_DIR$/closures/target" />
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index c72ff77..935ec18 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -27,16 +27,67 @@
         <entry file="file://$PROJECT_DIR$/minigrep_v2/src/main.rs">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="272">
-              <caret line="17" lean-forward="true" selection-start-line="17" selection-end-line="17" />
+              <caret line="17" selection-start-line="17" selection-end-line="17" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/minigrep_v2/src/lib.rs">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="624">
+              <caret line="39" selection-start-line="39" selection-end-line="39" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/add/Cargo.toml">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="96">
+              <caret line="6" selection-start-line="6" selection-end-line="6" />
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/minigrep_v2/src/lib.rs">
+        <entry file="file://$PROJECT_DIR$/add/add-one/src/lib.rs">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="960">
-              <caret line="60" column="40" selection-start-line="60" selection-start-column="40" selection-end-line="60" selection-end-column="40" />
+            <state relative-caret-position="208">
+              <caret line="13" column="5" lean-forward="true" selection-start-line="13" selection-start-column="5" selection-end-line="13" selection-end-column="5" />
+              <folding>
+                <element signature="e#30#31#0" expanded="true" />
+                <element signature="e#40#41#0" expanded="true" />
+                <element signature="e#87#88#0" expanded="true" />
+                <element signature="e#123#124#0" expanded="true" />
+              </folding>
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/add/adder/Cargo.toml">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="144">
+              <caret line="9" selection-start-line="9" selection-end-line="9" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/add/adder/src/main.rs">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="64">
+              <caret line="4" column="77" selection-start-line="4" selection-start-column="77" selection-end-line="4" selection-end-column="77" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/add/add-one/Cargo.toml">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="112">
+              <caret line="7" selection-start-line="7" selection-end-line="7" />
             </state>
           </provider>
         </entry>
@@ -103,6 +154,11 @@
         <option value="$PROJECT_DIR$/closures/src/lib.rs" />
         <option value="$PROJECT_DIR$/minigrep_v2/src/main.rs" />
         <option value="$PROJECT_DIR$/minigrep_v2/src/lib.rs" />
+        <option value="$PROJECT_DIR$/add/Cargo.toml" />
+        <option value="$PROJECT_DIR$/add/adder/src/main.rs" />
+        <option value="$PROJECT_DIR$/add/add-one/Cargo.toml" />
+        <option value="$PROJECT_DIR$/add/adder/Cargo.toml" />
+        <option value="$PROJECT_DIR$/add/add-one/src/lib.rs" />
       </list>
     </option>
   </component>
@@ -136,7 +192,33 @@
             <path>
               <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
               <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="minigrep" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="add" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+            </path>
+            <path>
+              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
+              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
+              <item name="add" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="add-one" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+            </path>
+            <path>
+              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
+              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
+              <item name="add" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="add-one" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+            </path>
+            <path>
+              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
+              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
+              <item name="add" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="adder" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+            </path>
+            <path>
+              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
+              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
+              <item name="add" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="adder" type="9f88c78c:ScopeViewTreeModel$FileNode" />
+              <item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
             </path>
             <path>
               <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
@@ -180,7 +262,7 @@
   </component>
   <component name="PropertiesComponent">
     <property name="JavaScriptWeakerCompletionTypeGuess" value="true" />
-    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1549056665919" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1549304605543" />
     <property name="javascript.nodejs.core.library.configured.version" value="7.1.0" />
     <property name="js.eslint.eslintPackage" value="$USER_HOME$/.yarn-config/global/node_modules/.bin/eslint" />
     <property name="js.eslint.nodeInterpreter" value="project" />
@@ -327,7 +409,7 @@
     <frame x="1920" y="-438" width="1080" height="1897" extended-state="6" />
     <editor active="true" />
     <layout>
-      <window_info content_ui="combo" id="Project" order="0" sideWeight="0.4968701" visible="true" weight="0.2540132" />
+      <window_info active="true" content_ui="combo" id="Project" order="0" sideWeight="0.4968701" visible="true" weight="0.2540132" />
       <window_info id="Structure" order="1" sideWeight="0.5031299" side_tool="true" visible="true" weight="0.2540132" />
       <window_info id="Image Layers" order="2" />
       <window_info id="Designer" order="3" />
@@ -344,7 +426,7 @@
       <window_info anchor="bottom" id="Docker" order="7" show_stripe_button="false" />
       <window_info anchor="bottom" id="Version Control" order="8" />
       <window_info anchor="bottom" id="Inspection Results" order="9" weight="0.32979318" />
-      <window_info active="true" anchor="bottom" id="Terminal" order="10" visible="true" weight="0.28563443" />
+      <window_info anchor="bottom" id="Terminal" order="10" visible="true" weight="0.28563443" />
       <window_info anchor="bottom" id="Event Log" order="11" side_tool="true" />
       <window_info anchor="right" id="Commander" order="0" weight="0.4" />
       <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
@@ -675,14 +757,55 @@
     <entry file="file://$PROJECT_DIR$/minigrep_v2/src/main.rs">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="272">
-          <caret line="17" lean-forward="true" selection-start-line="17" selection-end-line="17" />
+          <caret line="17" selection-start-line="17" selection-end-line="17" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/minigrep_v2/src/lib.rs">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="960">
-          <caret line="60" column="40" selection-start-line="60" selection-start-column="40" selection-end-line="60" selection-end-column="40" />
+        <state relative-caret-position="624">
+          <caret line="39" selection-start-line="39" selection-end-line="39" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/add/Cargo.toml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="96">
+          <caret line="6" selection-start-line="6" selection-end-line="6" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/add/adder/src/main.rs">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="64">
+          <caret line="4" column="77" selection-start-line="4" selection-start-column="77" selection-end-line="4" selection-end-column="77" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/add/add-one/Cargo.toml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="112">
+          <caret line="7" selection-start-line="7" selection-end-line="7" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/add/adder/Cargo.toml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="144">
+          <caret line="9" selection-start-line="9" selection-end-line="9" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/add/add-one/src/lib.rs">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="208">
+          <caret line="13" column="5" lean-forward="true" selection-start-line="13" selection-start-column="5" selection-end-line="13" selection-end-column="5" />
+          <folding>
+            <element signature="e#30#31#0" expanded="true" />
+            <element signature="e#40#41#0" expanded="true" />
+            <element signature="e#87#88#0" expanded="true" />
+            <element signature="e#123#124#0" expanded="true" />
+          </folding>
         </state>
       </provider>
     </entry>
diff --git a/add/Cargo.toml b/add/Cargo.toml
new file mode 100644
index 0000000..d26e7cf
--- /dev/null
+++ b/add/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+
+members = [
+    "adder",
+    "add-one",
+]
diff --git a/add/add-one/Cargo.toml b/add/add-one/Cargo.toml
new file mode 100644
index 0000000..2a2f5dc
--- /dev/null
+++ b/add/add-one/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "add-one"
+version = "0.1.0"
+authors = ["Timothy Warren <twarren@nabancard.com>"]
+edition = "2018"
+
+[dependencies]
+rand = "0.3.14"
diff --git a/add/add-one/src/lib.rs b/add/add-one/src/lib.rs
new file mode 100644
index 0000000..f12efc0
--- /dev/null
+++ b/add/add-one/src/lib.rs
@@ -0,0 +1,15 @@
+use rand;
+
+pub fn add_one(x: i32) -> i32 {
+    x + 1
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        assert_eq!(3, add_one(2));
+    }
+}
diff --git a/add/adder/Cargo.toml b/add/adder/Cargo.toml
new file mode 100644
index 0000000..ba0e032
--- /dev/null
+++ b/add/adder/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "adder"
+version = "0.1.0"
+authors = ["Timothy Warren <twarren@nabancard.com>"]
+edition = "2018"
+
+[dependencies]
+add-one = { path = "../add-one" }
+rand = "0.3.14"
diff --git a/add/adder/src/main.rs b/add/adder/src/main.rs
new file mode 100644
index 0000000..cec9a65
--- /dev/null
+++ b/add/adder/src/main.rs
@@ -0,0 +1,6 @@
+use add_one;
+
+fn main() {
+    let num = 10;
+    println!("Hello, world! {} plus one is {}!", num, add_one::add_one(num));
+}