diff --git a/README.md b/README.md
index 05c8bce..8278bff 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,7 @@ Alternatively, the content can be viewed in a web browser
       (Standard Library: `math` & `random` Modules;
        Third-party Packages: `numpy` Library;
        Writing one's own Modules)
+    - [summary <img height="12" style="display: inline-block" src="static/link/to_nb.png">](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/develop/chapter_02_functions/03_summary.ipynb)
 
 
 #### Videos
diff --git a/chapter_02_functions/03_summary.ipynb b/chapter_02_functions/03_summary.ipynb
new file mode 100644
index 0000000..c5d712b
--- /dev/null
+++ b/chapter_02_functions/03_summary.ipynb
@@ -0,0 +1,101 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "slide"
+    }
+   },
+   "source": [
+    "# Chapter 2: Functions & Modularization"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "skip"
+    }
+   },
+   "source": [
+    "## TL;DR"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "skip"
+    }
+   },
+   "source": [
+    "A user-defined **function** is a **named sequence** of statements that perform a computation.\n",
+    "\n",
+    "Functions provide benefits as they\n",
+    "\n",
+    "- make programs easier to comprehend and debug for humans as they give names to the smaller parts of a larger program (i.e., they **modularize** a code base), and\n",
+    "- eliminate redundancies by allowing **reuse of code**.\n",
+    "\n",
+    "Functions are **defined** once with the `def` statement. Then, they may be **called** many times with the call operator `()`.\n",
+    "\n",
+    "They may process **parameterized** inputs, **passed** in as **arguments**, and output a **return value**.\n",
+    "\n",
+    "Arguments may be passed in by **position** or **keyword**. Some functions may even require **keyword-only** arguments.\n",
+    "\n",
+    "**Lambda expressions** create anonymous functions.\n",
+    "\n",
+    "Functions are a special kind of **callables**. Any object that may be **called** with the call operator `()` is a callable. Built-in functions and **constructors** are other kinds of callables.\n",
+    "\n",
+    "Core Python can be extended with code from either the **standard library** or **third-party** libraries.\n",
+    "\n",
+    "Outside Jupyter notebooks, Python code is put into **modules** that are grouped in **packages**."
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.6"
+  },
+  "livereveal": {
+   "auto_select": "code",
+   "auto_select_fragment": true,
+   "scroll": true,
+   "theme": "serif"
+  },
+  "toc": {
+   "base_numbering": 1,
+   "nav_menu": {},
+   "number_sections": false,
+   "sideBar": true,
+   "skip_h1_title": true,
+   "title_cell": "Table of Contents",
+   "title_sidebar": "Contents",
+   "toc_cell": false,
+   "toc_position": {
+    "height": "calc(100% - 180px)",
+    "left": "10px",
+    "top": "150px",
+    "width": "384px"
+   },
+   "toc_section_display": false,
+   "toc_window_display": false
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}