This is a very nice introduction to numerical methods. The topics are presented in a logical and a pedagogical method. If your looking to learn numerical techniques this book will well serve your purpose. Readers unfamiliar with this book can see what others have said here.
To learn this material as well as possible I'm working through the book's exercises and wrote up solutions as I went along. This is a work in progress that currently includes solutions to some questions in Chapters 3. You can find the computational exercises (without explanations) for free in the links below. In my spare time I'm currently working on a text solution manual for this book. You can get a preview version here.
Code For Various Chapters: