Nikon D90 Digital Field Guide
J. Dennis Thomas is a professional photographer and author based in Austin, TX. He owns Dead Sailor Productions and has photographed for many notable clients. He has authored seven Digital Field Guides and has published articles in national photography magazines.
Title: Nikon D90 Digital Field Guide
Author: J. Dennis Thomas
David Busch's Sony Alpha a6000/ILCE-6000 Guide to Digital Photography 2014 US$ 32.99 384 pages
Photos for Mac and iOS: The Missing Manual 2015 US$ 25.99 338 pages