In in my Terry Pratchett tribute/re-read, I have been through Good Omens and the Johnny Maxwell trilogy.
Good Omens is a favorite for the collaboration with Neil Gaiman, for being another book with good memories of when I read it, and also great fun at author signings. I read the book from the library, and bought the large trade paperback. Then when I found the first printing at Dark Carnival in Berkeley, I bought it. Then when Terry and Neil came to Berkeley for signing at the old Cody's Book Store, I brought it in to be signed. Terry was first (and was happy to have released his book a month before Neil so that it would be on the bestseller list before being knocked off by Neil), and he asked if I knew that Neil would be coming in for a signing soon, and was I going to be there. I said yes, and he said, "Tell him I said, 'Rabbit."' When I saw Neil, I said, "Terry says, 'Rabbit.'" Neil look at me, and said, "What kind?" Unfortunately I never got to see Terry again, and was not able t o continue the game of long term telephone.
The Johnny Maxwell trilogy is a series of books that may be classified as juvenile, but sometimes those are the best books. They're a thoroughly fun series about an English boy who has very strange things happen to him, and his friends get caught up with it all. Only You Can Save Mankind was popular enough to be have been made into a radio show, and Johnny and the Dead and Johnny and the Bomb were both made into BBC productions.
Good Omens has also recently been made into a BBC radio show, and a movie is supposedly in development.
All of these books have the characteristic of being engaging books in that I can almost completely lose myself in them on BART to the point that I have sometimes had to rush to be ready for my stop.