Time for the Stars Robert A. Heinlein  

Farmer in the Sky Robert A. Heinlein  

The Star Beast Robert A. Heinlein  

The Green Hills of Earth Robert A. Heinlein  

The Day After Tomorrow Robert A. Heinlein  

Beyond This Horizon Robert A. Heinlein  

Orphans of the Sky Robert A. Heinlein  

Glory Road Robert A. Heinlein  

Time Enough for Love Robert A. Heinlein  

Double Star Robert A. Heinlein  

The Unpleasant Profession of Jonathan Hoag Robert A. Heinlein  

I Will Fear No Evil Robert A. Heinlein