Cat on the Edge by Shirley Rousseau Murphy is the first in her Joe Grey series. Joe in this instance is a cat, who somehow has acquired the knowledge and use of the English Language. For all Joe knows he's the only cat with this ability, and he's feeling rather lonely and sorry for himself when he witnesses a murder. The murder victim is a business associate of his owner, Clyde. The murderer sees Joe and tries to kill him. Joe runs away from home in an effort to protect his owner from the murderer. He meets up with another cat, Dulcie, who shares his unique abilities. Together they work to bring the murderer to justice, and save not only themselves, but their beloved owners. It's an interesting take on anthropomorphic animals. The author doesn't try to explain why these two cats have this ability, and many times seems to forget that her protagonists are cats. Their antics many times don't seem to be something that would be possible for actual cats to do. Who knows maybe with their human language capabilities they've also aquired superpowers. All in all it's an entertaining read, just check your knowledge of cat behaviours and abilities at the door.