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Red Planet Robert A. Heinlein   0345340396

The Door into Summer Robert A. Heinlein   0345330129

Waldo & Magic, Inc. Robert A. Heinlein   0345330153

Starship Troopers Robert A. Heinlein   0441783589

Citizen of the Galaxy Robert A. Heinlein   0345342445

Star Beast Robert A. Heinlein   0345350596

Space Cadet Robert A. Heinlein   0345353110

Tunnel in the Sky Robert A. Heinlein   0345353730

Time for the Stars Robert A. Heinlein   068419211X

Time Enough for Love Robert A. Heinlein   0441810764

Glory Road Robert A. Heinlein   0671877046

Bumblebee economics Bernd Heinrich   0674085809

Why We Run: A Natural History Bernd Heinrich   0060958707