Below are the first books on the market about Impala.
by John Russell (O'Reilly Media, 2015)
Learn how to write, tune, and port SQL queries using Impala.
by John Russell (O'Reilly Media, 2013)
Compact primer for people from the RDBMS world. Also in Japanese.
by Avkash Chauhan (Packt, 2014)
For Hadoop and Impala beginners.