I am a big fan of Packt Publishing (http://www.packtpub.com) and their model that supports print and e-books and keeps a repository of your purchased books in your account on their site - so you can always get a copy of your e-book if you lose it.
Packt Publishing is celebrating their 10 year anniversary with a good deal.
From June 26th through July 5th, Packt is offering all of its eBooks and Videos at just $10 each for any title!
If you need some Drupal or other tech books, this is a great deal.
FYI, DougRead more