Early Heinlein e.g. Have Spacesuit - Will Travel, Farmer In The Sky, The Rolling Stones or for non-juveniles, The Moon is a Harsh Mistress have lots of science.

Early Heinlein e.g. Have Spacesuit - Will Travel, Farmer In The Sky, The Rolling Stones or for non-juveniles, The Moon is a Harsh Mistress have lots of science. Later works, less so.