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