Nikon D90 is a great small sensor digital SLR with many features.    The list of tutorial DVDs were posted earlier.  Here is a list of books on Nikon D90. Please note: most books will not be available until early next year.

Magic Lantern Guides: Nikon D90

Written by best-selling author and Nikon technical expert Simon Stafford.  Simon Stafford wrote guidel books on Nikon D700, Nikon D3 and Nikon D80.  All these books received favorite reviews from readers.  

David Busch’s Nikon D90 Guide to Digital SLR Photography 

David D. Busch is a best-selling author of books on digital photography and imaging technology, and the originator of popular series like David Busch’s Pro Secrets and David Busch’s Quick Snap Guides. He has written six hugely successful guidebooks for Nikon digital SLR models.”David Busch’s Nikon D90 Guide to Digital SLR Photography” is a concise introduction and guide to your camera’s essential controls and functions. The book provides detailed instructions showing you the how, when, and why of focus modes, flash and lens options, how to choose zoom settings, and which exposure modes are best.

Nikon D90: From Snapshots to Great Shots  by Jeff Revell

Jeff Revell is best known as the photographer behind the popular “PhotoWalk Pro” blog, each weekday Jeff shares step-by-step tutorials on digital photography technique and editing of digital images.

Nikon’s new 90D bridges the gap between the novice and the seasoned pro with a perfect combination of high-speed and quality. For anyone who has upgraded from their point-and-shoot or first DSLR to a Nikon D90 and wants to get the best shots possible but isn’t sure what to do next.  This book  has one goal: to teach D90 owners how to make great shots using their Nikon camera. It teaches them how to use their 90D to create the type of photographs that inspired them to buy the camera in the first place. Everything in the book is in service of creating a great image.

For reviews, best lens, accessories, tutorial DVD, and free videos on Nikon D90 read here