updated readme - second edition

Author: loiane

README.md

@@ -3,26 +3,32 @@ Learning JavaScript Data Structures and Algorithms
 
 Source code of **Learning JavaScript Data Structures and Algorithms** book.
 
-Book link:
-  - [Packt](https://www.packtpub.com/application-development/learning-javascript-data-structures-and-algorithms)
-  - [Amazon](http://www.amazon.com/gp/product/1783554878/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1783554878&linkCode=as2&tag=loiagron-20&linkId=7VBQ7OMJ47XY7MUV)
+Book link - first edition:
+  - [Packt](https://www.packtpub.com/application-development/learning-javascript-data-structures-and-algorithms){:target="_blank"}
+  - [Amazon](http://www.amazon.com/gp/product/1783554878/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1783554878&linkCode=as2&tag=loiagron-20&linkId=7VBQ7OMJ47XY7MUV){:target="_blank"}
 
 
-###List of Chapters:
+### List of Chapters:
 
-* 1: JAVASCRIPT – A QUICK OVERVIEW
-* 2: ARRAYS
-* 3: STACKS
-* 4: QUEUES
-* 5: LINKED LISTS
-* 6: SETS
-* 7: DICTIONARIES AND HASHES
-* 8: TREES
-* 9: GRAPHS
-* 10: SORTING AND SEARCHING ALGORITHMS
-* 11: More about Algorithms (Recursion, Dynamic Programing, Greedy Algorithms and Big-O Notation) - Extra chapter that can be donwloaded from [Packt](https://www.packtpub.com/application-development/learning-javascript-data-structures-and-algorithms) website
-* Apendix A: Big-O Cheat Sheet - Extra chapter that can be donwloaded from [Packt](https://www.packtpub.com/application-development/learning-javascript-data-structures-and-algorithms) website
-
-###Found an issue or have a question?
+* 01: [JavaScript: a quick overview](https://github.com/loiane/javascript-datastructures-algorithms/tree/second-edition/chapter01)
+* 02: [Arrays](https://github.com/loiane/javascript-datastructures-algorithms/tree/second-edition/chapter02)
+* 03: [Stacks](https://github.com/loiane/javascript-datastructures-algorithms/tree/second-edition/chapter03)
+* 04: [Queues](https://github.com/loiane/javascript-datastructures-algorithms/tree/second-edition/chapter04)
+* 05: [Linked Lists](https://github.com/loiane/javascript-datastructures-algorithms/tree/second-edition/chapter05)
+* 06: [Sets](https://github.com/loiane/javascript-datastructures-algorithms/tree/second-edition/chapter06)
+* 07: Dictionaries and Hashes
+* 08: Trees
+* 09: Graphs
+* 10: Sorting and searching algorithms
+* 11: Pattern of algorithms
+* 12: More about algorithms
+* 13: Functional programming and data structures
+
+### First Edition source code:
+
+Please refer to [this link](https://github.com/loiane/javascript-datastructures-algorithms/tree/master)
+
+
+### Found an issue or have a question?
 
 Please create an [Issue](https://github.com/loiane/javascript-datastructures-algorithms/issues) or [Pull Request](https://github.com/loiane/javascript-datastructures-algorithms/pulls)