Dodger by Terry Pratchett
A new book from Terry Pratchett is always welcome, but Dodger is different from his Discworld series. It has flashes of humor, but far fewer straight-up jokes than usual. It has commentary on the London slums, but does not have the same satire of modern society that his other work does.
The setting is excellent, and the folklore interesting, but the mystery is not a mystery, and the love interest is a cypher. Some of the characters are well-rounded, but others merely assume that you know the historical figure. If you found Henry Mayhew an interesting character his book, London Labour and the London Poor, is available from Internet Archive.
An interesting book, and worth a read, but not, in my opinion, his best.
The Library Service has copies in text and audio.