Robert A Heinlein's Space Cadet was first published in 1948 and has been reprinted many times since. The very nature of the book and the title dictates that we're going to get a space-suited chap or two on the front of nearly every version. This is going to be interesting because its going to reflect suit design through the decades as each publisher reflects the technologies of their time.
This cover is painted by Darrell K Sweet and its a bit of a peach. The suit has a 2001: A Space Odyssey vibe which is from six years earlier but remains even now one of the seminal suit designs for a number of very good reasons which I'll go into when we cover that film