This book is great for people who are relatively new to user experience, but also acts as a really handy reference for more experienced practitioners too.
It gives you an overview of UCD (or Goal Directed Design as it's called in this book, that's Cooper's proprietary name for their process), with detailed chapters on organising a project, running and then analysing research, designing the product etc.
One of the best overall UX books I've seen for a while, and the first thing I would recommend anyone in this field to buy.
This book doesn't have the greatest title to accurately describe the contents of the book. If you work in UX then this book should really be a staple on your bookshelves. It's one of those books that not only explains the 'what' but also the 'why' and 'how' in great detail. I've found a lot of new tools and techniques in there that have really helped transform the way that I deliver UX. Buy it! there won't be any regrets.
What Kotler's Marketing Management did for aspiring marketing managers will Designing for the digital age do for future interaction designers. The book covers the complete project of interaction designing with inspiring real life examples. It has been a very useful tool for us at European Domain Centre when redesigning our website. Interaction design is a rather new science and this book will become the bible in this field.