The novel, "That Darn Cat," was written by The Gordons and published a few years before the movie came out. I read the book and it's excellent. It's set in Los Angeles and clearly has an adult slant, although people of all ages who like mysteries would enjoy the novel. There was both humor and suspense in the book---but the movie was written like a sitcom and everyone acted too silly and zany. The movie should have been filmed on the streets of Los Angeles rather than the fake-looking backlot of Disney Studios! Obviously The Gordons (husband & wife mystery writers) knew that in order to turn their excellent novel into a Disney film (circa 1965) they had to write a screenplay that was bland and silly. The movie is okay but the novel is much better!