< MUSHROOM
Peterson Field Guides: Mushrooms by Kent McKnight and Vera McKnight
Smithsonian Handbooks: Mushrooms by Thomas Laessoe and Gary Lincoff
Simon and Schuster's Guide to Mushrooms by Giovanni Pacioni
National Audubon Society Field Guide to Mushrooms by Gary H. Lincoff
Mushrooms of Northeast North America by George Barron
Lichens of North America by Irwin M. Brodo et al