docs: update README.md

lcci/README_EN.md

@@ -1,4 +1,4 @@
-# *Cracking the Coding Interview, 6th Edition*
+# [*Cracking the Coding Interview, 6th Edition*](http://ahmed-badawy.com/blog/wp-content/uploads/2018/10/Cracking-the-Coding-Interview-6th-Edition-189-Programming-Questions-and-Solutions.pdf)
 *Cracking the Coding Interview, 6th Edition* is here to help you through this process, teaching you what you need to know and enabling you to perform at your very best. I've coached and interviewed hundreds of software engineers. The result is this book.
 
 [中文文档](/lcci/README.md)
@@ -115,4 +115,7 @@
 |  [17.23](https://leetcode-cn.com/problems/max-black-square-lcci)  |  [Max Black Square](/lcci/17.23.Max%20Black%20Square/README_EN.md)  |  `Dynamic Programming`  |  Medium  |
 |  [17.24](https://leetcode-cn.com/problems/max-submatrix-lcci)  |  [Max Submatrix](/lcci/17.24.Max%20Submatrix/README_EN.md)  |  `Dynamic Programming`  |  Hard  |
 |  [17.25](https://leetcode-cn.com/problems/word-rectangle-lcci)  |  [Word Rectangle](/lcci/17.25.Word%20Rectangle/README_EN.md)  |    |  Hard  |
-|  [17.26](https://leetcode-cn.com/problems/sparse-similarity-lcci)  |  [Sparse Similarity](/lcci/17.26.Sparse%20Similarity/README_EN.md)  |  `Hash Table`  |  Hard  |
+|  [17.26](https://leetcode-cn.com/problems/sparse-similarity-lcci)  |  [Sparse Similarity](/lcci/17.26.Sparse%20Similarity/README_EN.md)  |  `Hash Table`  |  Hard  |
+
+## Copyright
+[@Doocs](https://github.com/doocs)

lcof/README_EN.md

@@ -1,5 +1,14 @@
-# *Coding Interviews, 2nd Edition*
+# [*Coding Interviews, 2nd Edition*](https://www.researchgate.net/file.PostFileLoader.html?id=5631f4596307d977348b4567&assetKey=AS:289838927499264@1446114393339)
+This book is about coding interview questions from software and Internet companies. It covers five key factors which determine performance of candidates: (1) the basics of programming languages, data structures and algorithms, (2) approaches to writing code with high quality, (3) tips to solve difficult problems, (4) methods to optimize code, (5) soft skills required in interviews. The basics of languages, algorithms and data structures are discussed as well as questions that explore how to write robust solutions after breaking down problems into manageable pieces. It also includes examples to focus on modeling and creative problem solving.
+
+Interview questions from the most popular companies in the IT industry are taken as examples to illustrate the five factors above. Besides solutions, it contains detailed analysis, how interviewers evaluate solutions, as well as why they like or dislike them. The author makes clever use of the fact that interviewees will have limited time to program meaningful solutions which in turn, limits the options an interviewer has. So the author covers those bases.
+
+Readers will improve their interview performance after reading this book. It will be beneficial for them even after they get offers, because its topics, such as approaches to analyzing difficult problems, writing robust code and optimizing, are all essential for high-performing coders.
 
 [中文文档](/solution/README.md)
 
-English description is not available for the book. Please switch to Chinese version.
+## Solutions
+English Solutions is not available for the book. Please switch to Chinese version.
+
+## Copyright
+[@Doocs](https://github.com/doocs)

solution/README_EN.md

@@ -1390,3 +1390,5 @@
 |  [1504](https://leetcode.com/problems/get-the-second-most-recent-activity)  |  [Get the Second Most Recent Activity](/solution/1500-1599/1504.Get%20the%20Second%20Most%20Recent%20Activity/README_EN.md)  |  Hard  |
 |  [1509](https://leetcode.com/problems/replace-employee-id-with-the-unique-identifier)  |  [Replace Employee ID With The Unique Identifier](/solution/1500-1599/1509.Replace%20Employee%20ID%20With%20The%20Unique%20Identifier/README_EN.md)  |  Easy  |
 
+## Copyright
+[@Doocs](https://github.com/doocs)