Sourcery by Terry Pratchett
It’s a pretty good book, though I didn’t enjoy it as much as Mort. It was pretty Action-Packed™ but it seemed a bit more scattered, probably because the action was scattered around various locations, and also because there were multiple “point of view” characters, so I didn’t really identify fully with all of them.
I heard some feedback from a friend of a friend that the Discworld books get tired and rehashed after about 10 of them. I’m starting to see some of that, though I am still thrilled with them, it’s not new and unexplored territory all the time. I think the expectation that they might be read out of order leads to the author repeating himself sometimes, because whenever we see a familiar element, he takes time to explain it rather than assuming we know it from the previous books.
Still quite a nice read, I recommend it, and any of the others I have reviewed here.
Crossing the valley
After a few each of the Rincewind, Death, Witches, Guard books, they do get sort of stale, but then Pratchett evolves into a new kind of writing and they become cool again. The last few books (The Truth, Thief of Time, The Fifth Elephant) I have liked very much indeed; although they are still Diskworld, there is more than fluffy extruded-fantasty-product parody to them.
Your mileage will, of course, vary.