This is the home of a free O’Reilly Media book about Apache CouchDB.The book is designed to guide you gently through using CouchDB with clear but practical scenarios. We progressively showcase key features, starting with simple document CRUD, working through to advanced MapReduce, and culminate with deployment tuning for performance and reliability. Sign up to the mailing list to stay updated and discuss changes. Each paragraph has a handy Comment link that allows you to quote text and post a comment to the mailing list. Feel free to make liberal use of this feature. This book is a work in progress. The number of chapters linked below reflect our progress.We’re mainly looking for high level commentary on the topics covered and on our clarity, tone, and pacing. Our editor will take care of spelling and other nitpicks. Read more: CouchDB: The Definitive Guide