PUBLIC MARKS from greut with tag xp

This book aims to give you a head start by providing a detailed down-to-earth account of how one Swedish company implemented Scrum and XP with a team of approximately 40 people and how they continuously improved their process over a year's time.

another (free as in beer) book to read

The best way to implement code quickly is to implement less of it. The best way to have fewer bugs is to implement less code.