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 ## Book on Python, Algorithms, and Data Structures
 
 
-- [PDF and source code for 1st edition (2014, published by Hanbit Media)](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/First_edition_2014/ebook_pdf/book_second_edition.pdf). 
+This is a book about algorithms and data structure in Python. I wrote & open-sourced & sold it to [Hanbit Media](http://www.hanbit.co.kr/) in 2014. 
 
-- [PDF and source code for 2nd edition (2019, ported to Python 3.7)](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/Second_edition_2019).
+It's loosely based on the exercises & theory from the book [Cracking the Code Interview](https://www.amazon.com/Cracking-Coding-Interview-Programming-Questions/dp/0984782850/).
 
+- [Here is the PDF for the book](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/First_edition_2014/ebook_pdf/book_second_edition.pdf).
+
+- [Here is the source code, including abstract structures, bitwise operations, builtin Python data structures, searching and sorting, trees, and real interview problems](https://github.com/bt3gl/Book-on-Python-Algorithms-and-Data-Structures/tree/master/First_edition_2014/ebook_src).
+
+- [Here are several samplings for coding challenges](https://github.com/bt3gl/Book-on-Python-Algorithms-and-Data-Structures/tree/master/First_edition_2014/other_resources), including [Project Euler](https://projecteuler.net/), [Top Coder](https://www.topcoder.com/challenges), [Interview Cake](https://www.interviewcake.com/), and [the eudyptula challenge](http://eudyptula-challenge.org/).
+
+Even after the years, this book can be useful if you are aiming to learning Python and/or practicing for software engineering interviews.
 
 
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-## Python, Algorithms, and Data Structures   (2nd Edition, 2019)
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