The Cat Who... series by Lillian Jackson Braun

The Cat Who Could Read Backwards
...Ate Danish Modern
...Turned On and Off
...Saw Red
...Played Brahms
...Played Post Office
...Knew Shakespeare
...Sniffed Glue
...Had 14 Tails *
...Went Underground
...Talked to Ghosts
...Lived High
...Knew a Cardinal *
...Moved a Mountain
...Wasn't There
...Went Into the Closet
...Came to Breakfast
...Blew the Whistle *
The Cat Who Said Cheese
...Tailed a Thief
...Sang for the Birds
...Saw Stars
...Robbed a Bank *
...Smelled a Rat
...Went Up the Creek *
Short and Tall Tales
The Cat Who Brought Down the House
The Cat Who Talked Turkey
The Cat Who Went Bananas