Just rewatched this Merrie Melodies cartoon on the Varsity Show DVD. It has the characters on the book covers in a big shelf full of them coming to life, often in the caricatures of the film actors that portrayed them. It also had some black characters portrayed with big lips which is considered offensive today so kudos to Warner Bros. for including a disclaimer to that effect. Quite musically pleasing and a bit funny in some scenes concerning the film stars being drawn. Frank Tashlin was one of the most creative animation directors at the time and he's done well with something like this. So on that note, I recommend Have You Got Any Castles?