This book is great - all the recipes we've tried so far have been a complete success (which makes a change in our house)! There are recipes for everything from basic chocolate chip cookies to fun biscuits for kids to dainty little treats. We really like the way many of the recipes have an alternative too - e.g. replace such and such with cocoa for a chocolate dough or add lemon for a... etc etc.
There is a great section at the start with advice on how to avoid common pitfalls when baking cookies too.
Definitely recommend it as the one and only book you'll need on biscuits!