Contamination Crew By: Alan Edward Nourse

Contributions to the Theory of Natural Selection A Series of Essays By: Alfred Russel Wallace

Control Group By: Roger D. Aycock

Conversations on Chemistry, V. 1-2 In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments By: Mrs. (Jane Haldimand) Marcet

Coral and Coral Reefs By: Thomas Henry Huxley

Coral Reefs By: Charles Darwin

Cost of Living By: Robert Sheckley

Country Walks of a Naturalist with His Children By: W. (William) Houghton

Creatures of the Night A Book of Wild Life in Western Britain By: Alfred Wellesley Rees

Creatures of Vibration By: Harl Vincent

Crime and Its Causes By: William Douglas Morrison

Criminal Man According to the Classification of Cesare Lombroso By: Gina Lombroso

Criminal Negligence By: J. Francis McComas

Criminal Psychology; a manual for judges, practitioners, and students By: Hans Gustav Adolf Gross

Criminal Sociology By: Enrico Ferri

Criticism on "The origin of species" By: Thomas Henry Huxley

Crossroads of Destiny By: H. Beam Piper

Cry from a Far Planet By: Tom Godwin

Cully By: Jack Egan

Cum Grano Salis By: Randall Garrett

Curious Lore of Precious Stones By: George Frederick Kunz

Cutting It Out How to get on the waterwagon and stay there By: Samuel G. (Samuel George) Blythe

Danger in Deep Space By: Carey Rockwell

Danger! A True History of a Great City's Wiles and Temptations The Veil Lifted, and Light Thrown on Crime and its Causes, and Criminals and their Haunts. Facts and Disclosures. By: Abraham H. Hummel

Danger! and Other Stories By: Sir Arthur Conan Doyle

Darwin and Modern Science By: A. C. (Albert Charles) Seward

Darwin, and After Darwin An Exposition of the Darwinian By: George John Romanes

Darwiniana : Essays — Volume 02 By: Thomas Henry Huxley

Darwiniana; Essays and Reviews Pertaining to Darwinism By: Asa Gray

Daughter of the Sun A Tale of Adventure By: Jackson Gregory

Daughters of Doom By: Herbert B. Livingston

Day of the Moron By: H. Beam Piper