Lichen: A Beginner’s Guide to the Lichens of the World by Rob Hodgson.

Discover 18 common lichens hiding on trees, rocks, walls, and pavements — if you know how to look.

Each illustrated lichen character has its own double-page spread, showing where to find it, what it looks like, and a few curious facts.

This handy A6 guide is printed on nice recycled paper in the UK and fits perfectly in your pocket for your next lichen hunt.

Get your copy here (£7).