Space Cat

Space Cat (1952) was the first in a series of four children's books by Ruthven Todd.  They were pretty successful in the 1950s and 1960s. If the idea of a smart cat going with his astronaut keeper on a trip to the moon, where the cat discovers alien life in cavern, and saves the life of his astronaut companion, sounds interesting, then this book will appeal to you. For me, the book was pleasantly done but mostly outside my sympathies.