The book Introduction To Algorithms by Thomas H Cormen is so good for those people who wants to master Data structure and algorithms. I read this book and practice my Data structure and algorithms and believe me this book improves my algorithm and logical thinking. The prerequisite of this book is you just want to know about programming and have a upper hand on concept of programming. This book is recommended by almost all professors, competitive programmers, Software Engineers. Try this book and you will get improvement.