Apache Accumulo Book

Accumulo: Application Development, Table Design, and Best Practices
By Aaron Cordova, Billie Rinaldi, Michael Wall

I've written a book on the data store software Apache Accumulo along with Michael Wall and Billie Rinaldi. The book is for everyone who wants to get up to speed on Accumulo, developers looking to write applications, and administrators working with small to very large Accumulo clusters.