The Photographer’s Guide to Washington, D.C.: Where to Find Perfect Shots and How to Take Them
With picturesque postcard images and straightforward instructions, this book describes how to view and photograph famous and lesser-known sites, from the Lincoln Memorial and the White House to nearby Mount Vernon. Both veteran travel writers/photographers, Lee Foster and Ann Purcell give you complete directions to the sites and indicate what time of day and year will produce the most pleasing images and memories.
http://www.amazon.com/Photographers-Guide-Washington-D-C-Perfect/dp/0881508187/ref=sr_1_1?ie=UTF8&s=books&qid=1248219526&sr=1-1