Best books by Robert Heinlein? Which are your favorites and what are they about?

Question: Best books by Robert Heinlein!? Which are your favorites and what are they about!?
Best Answer - Chosen by Asker:

"Stranger in a Strange Land" a book about what a functional religion might be like, if there were such a thing!.Www@QuestionHome@Com

Starship Troopers is among my favorites and chronicles the life of a trooper - see link below !.
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Starship Troopers!.
It's title pretty much describes the content!.Www@QuestionHome@Com