Thief of Time is a story about the History Monks and how they manage Time on the Disc. It’s about a young apprentice to Lu Tze, the Sweeper, who first appeared in #13 Small Gods. It’s also about the building of a clock so accurate that it follows the tick of the Universe.I almost don’t know how to review Discworld books any more because I keep coming back to the same themes, that they’re good but I don’t love them like I once did, that I’m not sure if that’s the books or me, that maybe I just know the patterns of humour too well, that they’re always at least pleasant and some are excellent.So by reputation this was supposed to be an excellent one and whilst it’s toward the better end, particularly of the Discworld books I’ve read lately it didn’t blow me away.There’s a lot of fun to be had though and I wouldn’t want to put anyone off.