Published Date: May 2018
Edition: revised reprint 2019
The Jingo Wobbly guide to the climbing around Fontainebleau brings their inimitable style and a certain charm.
This guide is a classic, and you will see a lot of people using it in the forest.
It might not cover all the problems in the forest, but it has good coverage of the lower grades, most of the circuits and areas, and good maps to make sure you don't get lost stomping around the trees.
Around 7000 problems are documented, with over 1600 high quality pictures.