User Stories Applied by Mike Cohn is one of our favourite books on Agile User Stories. The book starts with an overview into user stories, and details what a user story is and the different aspects of them. He then discusses how to go about writing a user story, and provides details of the INVEST criteria that can be used to determine if the story is meeting all of its objectives. Next Mike gives an in depth discussion of who user stories are written for and where to begin when gathering the details for them. The book then discusses acceptance testing user stories, including how to go about specifying these criteria and the responsibilities of the development team and customers during this process.

Scrum Master: From Good to Great Servant Leadership by Geoff Watts is another one of our favourite Scrum Books. This book is exceptionally well written and offer practical working examples for Scrum Mastery. This guidance is backed up with useful stories about what the true masters of Scrum do. This book is full of useful ideas for improving your Scrum mastery. Its a book we return to over and over again. A must for any Scrum Masters book shelf.