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

Cubs of the Wolf By: Raymond F. Jones

Cully By: Jack Egan

Cum Grano Salis By: Randall Garrett

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

Damned If You Don't By: Randall Garrett

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

Deaconesses in Europe and their Lessons for America By: Jane M. (Jane Marie) Bancroft

Dead Giveaway By: Randall Garrett

Dead Man's Planet By: Joseph Samachson

Dead Ringer By: Lester Del Rey

Dead World By: Jack Douglas

Dearest By: H. Beam Piper

Death of a Spaceman By: Walter M. Miller

Death Wish By: Robert Sheckley

Debian GNU/Linux : Guide to Installation and Usage By: Ossama Othman

Decision By: Frank M. Robinson

Deep Furrows By: Herbert Joseph Moorhouse

Delineations of the Ox Tribe The Natural History of Bulls, Bisons, and Buffaloes. Exhibiting all the Known Species and the More Remarkable Varieties of the Genus Bos. By: George Vasey