Update README.md

Author: cormacpayne

README.md

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 This repository contains notes that have been converted from slideshows I created in college for the University of Florida Programming Team. I plan on adding notes for the more advanced topics I did not get to while at college. If you have any questions, requests, or find an error in the provided notes, please feel free to either open an issue or contact me at [email protected]
 
+## Websites for Practice
+
+Below are websites I recommend for practicing contests and individual problems
+
+- [Sphere Online Judge (SPOJ)](http://www.spoj.com/)
+- [Codeforces](http://codeforces.com/)
+- [Topcoder](https://www.topcoder.com/)
+- [UVa Online Judge](https://uva.onlinejudge.org/)
+- [Kattis](https://open.kattis.com/)
+- [HackerRank](https://www.hackerrank.com/)
+
+## Books
+
+Below are books that I recommend reading if you are interested in learning more about competitive programming, as well as data structures and algorithms
+
+- [Competitive Programming, 3rd Edition - Steven Halim](https://www.amazon.com/Competitive-Programming-3rd-Steven-Halim/dp/B00FG8MNN8)
+- [The Algorithm Design Manual, 2nd Edition - Steven Skiena](https://www.amazon.com/Algorithm-Design-Manual-Steven-Skiena/dp/1848000693/ref=sr_1_1?s=books&ie=UTF8&qid=1484196474&sr=1-1&keywords=the+algorithm+design+manual)
+- [Introduction to Graph Theory, 2nd Edition - Richard Trudeau](https://www.amazon.com/Introduction-Graph-Theory-Dover-Mathematics/dp/0486678709)
+- [Introductory Graph Theory - Gary Chartrand](https://www.amazon.com/Introductory-Graph-Theory-Dover-Mathematics/dp/0486247759/ref=pd_sim_14_25?_encoding=UTF8&pd_rd_i=0486247759&pd_rd_r=D7Q9XSGFQ9J1TGQTYCZ0&pd_rd_w=KswGa&pd_rd_wg=0ayQt&psc=1&refRID=D7Q9XSGFQ9J1TGQTYCZ0)
+
 ## Completed Notes
 
 ### Basics