Stranger in a Strange Land by Robert Heinlein

Heinlein intended this sci-fi masterpiece to be disturbing, shocking, and entertaining. It is. It sparkles and crackles, it produces goosebumps of apprehension and dissatisfaction with the human race. 

Tackling radical ideas about sexual liberation, free love and religion that were enormously controversial at the time – and continue to be hotly debated talking points today – Stranger in a Strange Land struck a chord with a generation in the midst of a period of great change and remains an essential read.

Berkley Medallion Books 1968 paperback edition in good condition.