Now you have the opportunity to learn about Hadoop from a master—not only of the technology, but also of common sense and plain talk. —Doug Cutting, Hadoop Founder
Hadoop: The Definitive Guide, Second Edition is a book about Apache Hadoop by Tom White, published by O’Reilly Media. From Avro to ZooKeeper, this is the only book that covers all the major projects in the Apache Hadoop ecosystem.
The Third Edition will be available in May 2012.