Until reading this, I had no idea the film Predestination was based on a Heinlein short.
Totally subjective opinion, but 1970s Heinlein is the literary equivalent of somebody's creepy libertarian uncle who leers at teenage girls.
subjective, sure, but pretty widely agreed upon. :-/ Yeah, his later stuff is just as fun and engaging as his earlier works, IMO, but I wouldn't want to let a too-impressionable teen read it, or try to explain the outline to my mother.