Another book I read this year is Succeeding with Agile: Software Development Using Scrum by Mike Cohn. Mike has shares his experience with Scrum with several case studies and more particularly SalesForce who was able to retransform itself into an Agile software development company.
The also book describes how to go through the Agile transformation with Scrum and the techniques to ramp-up teams and more…
Another great reading…
johonline's blog 
Thanks for sharing. This is an additional for my bookshelf.