Space cat is a series of 4 books written in the 1950’s by Scottish novelist Ruthven Todd about Flyball the cat and his adventures in outer space. The books are filled with charming illustrations by Paul Galdone who also designed the set of 4 covers that have made the books highly collectible and hard to find. The Book isn’t in the public domain so I can’t send you to read them, but in 2018 the set was re-issued and is available for purchase at a reasonable price. Here’s the link to Amazon, but the books can be found at most major book stores. Click through if you’d like to see the other 3 book covers – they are fun!