Alternative Processes Condensed A Manual of Gum Dichromate and Other Contact Printing Processes Christina Z. Anderson Another guide packed full of information from the author of "Experimental Photography Workbook".
Experimental Photography Workbook Christina Z. Anderson A no-frills, darkroom guide on a variety of experimental techniques. A technical book recommended both for beginners and pros.
A Non Silver Manual
Cyanotype, Brownprint, Palladium & Gum Bichromate with Instructions for Making Light-Resists Including Pinhole Photograpy.
Sarah Van Keuren
The Chrysotype Manual The Science and Practice of Photographic Printing in Gold Mike Ware Well researched encyclopedia on chrysotypes.
