I don't know but it is the bestest of all of them! Because there are barricades! (I wish we had seen more of the Earnest And Well-Organized Young Revolutionaries, though.) (I re-read it because I have that, and I don't have Les Mis, and I was like "NEED BARRICADE BOOK TO CARRY WITH ME IN CAR."

...Ankh-Morpork Combeferre is an apprentice Alchemist, right? Like I really want to make him another UU student, but I can't make myself tear him away from all of the glorious explosives.

(Also there's the thing where the alchemists are all about Progress! and most of the wizards... aren't. But the wizards are the ones doing the pure research for the hell of it. He's either a student alchemist who spends a lot of time visiting the High Energy Magic building, or a student wizard who spends a lot of time at the alchemists' guildhall trying to set off black powder in new ways using magic. CAN'T DECIDE.)