[aGHz]

Several comments here advise getting a good mushroom identification book instead of relying on plant id apps for foraging. Do you have any recommendations? And more generally, how would you go about assessing the trustworthiness of any such book?

[mordechai9000]

Mushrooms Demystified by David Arora

Edit: this is the definitive resource for serious amateur mushroom enthusiasts in North America. It has a wealth of information on understanding the identifying characteristics of mushrooms, as well as keys to aid in the identification of many common genera and species. It's one of those books I find entertaining just to open and read at random. YMMV.

[micro_cam]

This is the Bible. his pocket guide is great as well and much easier to carry. he himself is quite the legend as well.

[microjim]

Often localised ID or reference books can become like bibles. Consult your local mycologists or fungi enthusiast groups!

[anm89]

There is no one right answer to this question. Find someone locally who is into mushrooming and ask them what is the best guide for your area.