The Cat Who Played Brahms (Cat Who... Book 5)
The Cat Who Played Post Office (Cat Who... Book 6)
The Cat Who Sniffed Glue (Cat Who... Book 8)
The Cat Who Talked to Ghosts (Cat Who... Book 10)
The Cat Who Lived High (Cat Who... Book 11)
The Cat Who Could Read Backwards (Cat Who... Book 1)