The cat who walks through walls

Time Enough For Love

Robert A. Heinlein

Friday

Robert A. Heinlein

The moon is a harsh mistress

Robert A. Heinlein

The Door into Summer

Robert A. Heinlein

Stranger in a Strange Land

Robert A. Heinlein

Have Spacesuit--Will Travel

Robert A. Heinlein

The Puppet Masters

Robert A. Heinlein

Starship Troopers

Robert A. Heinlein

Methuselah's children

Robert A. Heinlein

Double Star

Robert A. Heinlein

The past through tomorrow

Robert A. Heinlein

Foundation and Empire

Isaac Asimov