I have collected all 57 journals. Twice.
Once during my first playthrough (finished the campaign on hard then went back in some episodes for the missing journals). Then I did a fresh start and played the game on casual again just for the journals.
Nope, still not getting it unlocked.
This game is really a mess, based on its glitchy achievements. Obviously Demolition Derby and Fireworks are not unlockable in this GFWL PC version (except for 1 guy who has it somehow); and Grease Monkey is said to be glitched as well. These facts are already annoying... but after collecting all the journals twice, and still not getting Bookworm, well this really blows.
Anyone with some idea or suggestion? If there is no solution I think I'm just going to let this one slide.
If you play the PC GFWL version, and the 3 achievements mentioned above don't get unlocked for the first time (after you did everything correctly for them), do not waste anymore time on this. It is better to just move on, let it go, because the second try would consume much more of your worthy time, and it couldn't even compensate it with enough achievement points, even if you would get them unlocked (but you would not, because I think there is a serious "achievement desync" bug somewhere in the game, or in the communication method between the save file and the live profile).
So do yourself a favor.