Between Planets

Between Planets - Robert A. Heinlein Don Harvey is "between planets." His father is from Earth and his mother from Venus--and he's caught between planets during an interplanetary war. Written in 1951, this is one of Heinlein's "juveniles" written about and for teen boys. As such, there's no weird nudist, polyamory or "free love" in this one. That, for me, is a good thing and why I prefer many of Heinlein's juveniles to many of his later adult books. I wouldn't put this at the top of Heinlein's books, nor is it one of his worse. Some aspects are dated (such as their being sentient indigenous Venusians) but it's still an entertaining space opera.