In reply to jessica-h:
Depends what grade you climb. If you're interested in the lower grades the newly released Au grès des trois pignons is the most up-to-date (lots of circuits have been overhauled these past few months), but it only covers the Trois pignons area. The English "translation" is poor but I assume it does the job. On the bright side it was written by Jean-Jacques Naëls, aka Pépito, aka one of the few Bleausards who relentlessly refresh the circuits, so the topo pays for the paint and the many hours spent in the field.
If you're interested in the 5th and 6th grade problems, the guidebook I use everyday is Bart van Raaij's 5+6. Perhaps a tad expensive since you'll have to buy one for the Forêt domaniale de Fontainebleau and one for the Trois pignons but it's probably the most comprehensive and the one with the most accurate maps. The only times I struggled to find an area was because said areas were overgrown. One criticism: Bart "forgot" to exclude some areas where any foot traffic is now prohibited as they're now part of so-called integral biological reserves. Also like I said many circuits have been repainted and modified since Bart's topo was published so it can be confusing.
If you want to climb 7s and 8s, Bart's 7+8 is very good too, and Jean-Jacques Naëls' and local strongman Sébastien Frigault's Sept à + is also worth mentioning, though again it covers areas where climbing is forbidden.
Had a quick look at Fun Bloc, didn't like the layout.
Post edited at 12:47