Reddit reviews Mushrooms: River Cottage Handbook No.1

This is a guide to foraging mushrooms in the UK with recipies.

https://www.amazon.co.uk/Mushrooms-River-Cottage-Handbook-No-1/dp/0747589321

I would though say, if you are new to this, get some expert help to get started as mistakes can be very unpleasant and surprisingly easy to make (look at field mushrooms, one of the most common eaten and then look at Death Cap. Almost identical and live side by side).

The Forager Handbook by Miles Irving is very thorough in it's number of edibles, but not fantastic to carry around or for ID. I combine it with The Wild Flower Key by Francis Rose. I pick a couple plants from the Forager Hand book at a time and look for them on a walk.
Another book is the River Cottage Hedgerow by John Right, in fact all three of his book are well done; Mushrooms and Edible Seashore.