(ISBN: 978-0-470-48432-6, Paperback: 648 pages)
Congrats to Roland and Jos for completing and releasing the much awaited tome for Pentaho Solutions !
It's had some good reviews and as it is with tech specific subjects expects some level of understanding re DWH/BI (DWH Toolkit vol. 2)

Pentaho's Beekeeper blurb also does a good job of tackling the open source model from their perspective.