diff --git a/sorting_searching/merge_sort/merge_sort_challenge.ipynb b/sorting_searching/merge_sort/merge_sort_challenge.ipynb
index f22a1b7..46a8f9c 100644
--- a/sorting_searching/merge_sort/merge_sort_challenge.ipynb
+++ b/sorting_searching/merge_sort/merge_sort_challenge.ipynb
@@ -4,7 +4,14 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://bit.ly/code-notes).</i></small>"
+    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/coding-challenges).</i></small>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Challenge Notebook"
    ]
   },
   {
@@ -17,7 +24,8 @@
     "* [Test Cases](#Test-Cases)\n",
     "* [Algorithm](#Algorithm)\n",
     "* [Code](#Code)\n",
-    "* [Unit Test](#Unit-Test)"
+    "* [Unit Test](#Unit-Test)\n",
+    "* [Solution Notebook](#Solution-Notebook)"
    ]
   },
   {
@@ -26,7 +34,7 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "*Problem statements are often intentionally ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n",
+    "*Problem statements are sometimes ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n",
     "\n",
     "* Is a naiive solution sufficient?\n",
     "    * Yes"
@@ -50,7 +58,7 @@
    "source": [
     "## Algorithm\n",
     "\n",
-    "Refer to the solution notebook.  If you are stuck and need a hint, the solution notebook's algorithm discussion might be a good place to start."
+    "Refer to the [Solution Notebook](http://nbviewer.ipython.org/github/donnemartin/coding-challenges/blob/master/sorting_searching/merge_sort/merge_sort_solution.ipynb).  If you are stuck and need a hint, the solution notebook's algorithm discussion might be a good place to start."
    ]
   },
   {
@@ -79,7 +87,7 @@
    "source": [
     "## Unit Test\n",
     "\n",
-    "*It is important to identify and run through general and edge cases from the [Test Cases](#Test-Cases) section by hand.  You generally will not be asked to write a unit test like what is shown below.*\n",
+    "\n",
     "\n",
     "**The following unit test is expected to fail until you solve the challenge.**"
    ]
@@ -122,6 +130,15 @@
     "if __name__ == '__main__':\n",
     "    main()"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Solution Notebook\n",
+    "\n",
+    "Review the [Solution Notebook](http://nbviewer.ipython.org/github/donnemartin/coding-challenges/blob/master/sorting_searching/merge_sort/merge_sort_solution.ipynb) for a discussion on algorithms and code solutions."
+   ]
   }
  ],
  "metadata": {
diff --git a/sorting_searching/merge_sort/merge_sort_solution.ipynb b/sorting_searching/merge_sort/merge_sort_solution.ipynb
index 0ac730b..c30cef5 100644
--- a/sorting_searching/merge_sort/merge_sort_solution.ipynb
+++ b/sorting_searching/merge_sort/merge_sort_solution.ipynb
@@ -4,7 +4,14 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://bit.ly/code-notes).</i></small>"
+    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/coding-challenges).</i></small>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Solution Notebook"
    ]
   },
   {
@@ -26,7 +33,7 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "*Problem statements are often intentionally ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n",
+    "*Problem statements are sometimes ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n",
     "\n",
     "* Is a naiive solution sufficient?\n",
     "    * Yes"
@@ -118,8 +125,7 @@
    "metadata": {},
    "source": [
     "## Unit Test\n",
-    "\n",
-    "*It is important to identify and run through general and edge cases from the [Test Cases](#Test-Cases) section by hand.  You generally will not be asked to write a unit test like what is shown below.*"
+    "\n"
    ]
   },
   {