These guys are more about training you on software you might already use.
Anyway, their sale is thru july 9th. Coupon code July4.peachpit sales link
Celebrate independence with knowledge. Now through July 9, save 45% on most learning products including books, eBooks, simulators, and video training. Enter discount code JULY4 at checkout.*
Most eBooks are available as DRM-free EPUB, MOBI, and PDF—all together for one price so you can learn on your desktop or mobile device, your choice!
* Sale prices displayed reflect a 45% discount achieved with purchase of eligible title and application of discount code JULY4.