The Shepherd's Crown
This is the late, great, Sir Terry Pratchett's last novel. It's better than his final adult novel, Raising Steam--it's a connected story, at least--but that's not saying much. Basically, it reads like a set of outtakes and Post-It notes and cribs from other novels, strung together in rough order. Much of the substance borrows from, and to some extent undermines, the far superior Lords and Ladies.
For the rest, there are too many disparate elements for it to work. A few of the elements show bits of the old Pratchett genius. If you're both a Pratchett fanatic and a completist (ahem), the book may be worth your while on that basis, or as an homage to Pratchett's memory. As a story, sadly, it's not really worthwhile.
If by some criminal mischance you've never read Terry Pratchett, I'd recommend starting with Guards! Guards! and then proceeding to its two immediate sequels, Men at Arms and Feet of Clay.