Thể loại sách nói : Science

The Romance of Modern Chemistry
James C. Philip

Hunter Patrol
H. Beam Piper and John McGuire

A Slave is A Slave
H. Beam Piper

The K-Factor
Harry Harrison

The Untroubled Mind
Herbert J. Hall

Stand by for Mars
Carey Rockwell

Studies in the Psychology of Sex, Volume One
Havelock Ellis

Triplanetary, First in the Lensman Series
E. E. “Doc” Smith

The Misplaced Battleship
Harry Harrison

Creative Chemistry
Edwin E. Slosson

Arm of the Law
Harry Harrison

The Skylark of Space
E. E. Smith