Introduction to Algorithms
- Author Thomas H. Cormen
- Publication Prentice Hall of India

This is such an amazing book, don't care about its size, care for its contents.
I am in love with this book.
Algorithms were never explained better before.
I am much better programmer now,then I was before reading this book,I havent finished even half of this book, but some how after reading this, my perception on problem solving has changed, every problem now I think is solvable and design algorithms on principles and foundations laid by this book.Hats off to the authors.

I would also like to add "How to solve it by computer" by R.G. Dromey
This is a classic book is the simplest book on algorithms I have ever came across. It contains nothing but algorithms which are suited for beginners. Author has described the algorithms in its simplest form, I recommend this book as a must have if you are learning to code.

Finally if you are interested in algorithms(with considerable amount of knowledge in discrete mathematics), Dr.Knuth's series "The Art Of Computer Programing"is a must have as well. All volumes are brilliantly written,I love the third volume, in which Dr.Knuth has written algorithms based on only sorting and it amazes me to no extent by the fact that there are so many different types of algorithms apart from regular that we use,just to sort.