How Artists use Photographs

Here's an interesting blog post with examples of how artists used photo references for their book covers, most examples are from pulp fiction. Underpaintings - A forum posted by Matthew D. Innis which celebrates excellence in Representational Art - past, present, and future.

Another post from the same blog, this one is about Gil Elvgren.



Pulp Art: Original Cover Paintings for the Great American Pulp Magazines

The Incredible Pulps: A Gallery of Fiction Magazine Art (Graphic Art)

Pulp Fiction Art - Cheap Thrills and Painted Nightmares




Gil Elvgren: All His Glamorous American Pin-Ups (Taschen 25th Anniversary Special Editions)

The Best of Gil Elvgren

Gil Elvgren: The Wartime Pin-Ups (Vignettes S.) (Vol 1)

Mammoth Book of Pulp Fiction (Paperback)

How to Draw Noir Comics: The Art and Technique of Visual Storytelling has a chapter on drawing from photographs,check out pages 22 to 24 on the Amazon preview.