'Mushrooms: How to Identify and Gather Wild Mushrooms and Other Fungi' Thomas LaessoeNorth Spore
A beautifully photographed hardcover beginner's identification guide. Covers a wide range of mushrooms likely encountered in the wild. This book isn't focused on edible mushrooms but makes a great companion for the mycophile interested in learning how to identify a slew of wild fungi (it's nice to know more than just the edible varieties!). Organized by family.