Merge pull request #116 from dan1982code/master

I added a new book that I worked on over the past few years. I wanted…

README.md

@@ -118,6 +118,7 @@ Share the list with your classmates, your friends and everyone :)
 | ★★☆ | [Competitive Programming](https://cpbook.net/), by Steven and Felix Halim | This book contains a collection of relevant data structures, algorithms, and programming tips. It's a well-received book. ... The first edition is free for [download (pdf)](http://www.comp.nus.edu.sg/~stevenha/myteaching/competitive_programming/cp1.pdf). |
 | ★★☆ | [Programming Challenges: The Programming Contest Training Manual](https://www.amazon.com/Programming-Challenges-Contest-Training-Computer/dp/0387001638), by Steven Skiena and Miguel Revilla | This book includes more than 100 programming challenges, as well as the theory and key concepts necessary for approaching them. Problems are organized by topic, and supplemented by complete tutorial material. |
 | ★★☆ | [Competitive Programmer's Handbook](https://cses.fi/book/index.html), by Antti Laaksonen | An introduction to competitive programming for aspiring IOI and ICPC contestants. Free to [download (pdf)](https://cses.fi/book/book.pdf). |
+| ★★☆ | [Algorithmic Thinking: A Problem-Based Introduction](https://nostarch.com/algorithmic-thinking), by Daniel Zingaro | A book that teaches data structures and algorithms using competitive programming problems (IOI, USACO, CCC/CCO, etc.). |
 | ★★☆ | [Computational Geometry: Algorithms and Applications](https://www.amazon.com/Computational-Geometry-Applications-Mark-Berg/dp/3540779736), by Mark de Berg, Otfried Cheong, Marc van Kreveld, Mark Overmars | This is a well-written book which covers a broad range of computational geometry problems. |
 | ★☆☆ | [The Hitchhiker’s Guide to the Programming Contests](http://comscigate.com/Books/contests/icpc.pdf), by Nite Nimajneb | This book is free for [download (pdf)](http://comscigate.com/Books/contests/icpc.pdf). This book covers various topics relevant to competitive programming. |
 | ★★★ | [プログラミングコンテストチャレンジブック (Japanese)](http://goo.gl/M4yfbr), by 秋葉拓哉, 岩田陽一, 北川宜稔 | An absolutely phenomenal book. The contents, organized in a very coherent manner, are nothing short of amazing. ... 培養與鍛鍊程式設計的邏輯腦：世界級程式設計大賽的知識、心得與解題分享 (Chinese Traditional) |