|Principles of Transaction Processing (The Morgan Kaufmann Series in Data Management Systems)|
author: Philip A. Bernstein
list price: $75.95 USD
amazon price: $55.23 USD
This book is sort-of the readers digest version of the Jim Gray TP book and it borrows heavily from that book, but of course it covers only a sliver of Gray's work. That said, this is much more accessible and contains a very good description of idempotence and reliable messaging.