ZooKeeper (2013)
Part I. ZooKeeper Concepts and Basics
Chapter 2. Getting to Grips with ZooKeeper
Part II. Programming with ZooKeeper
Chapter 3. Getting Started with the ZooKeeper API
Chapter 4. Dealing with State Change
Chapter 5. Dealing with Failure
Chapter 6. ZooKeeper Caveat Emptor
Chapter 8. Curator: A High-Level API for ZooKeeper
Part III. Administering ZooKeeper
Chapter 9. ZooKeeper Internals