The Encyclopedia of Demons and Demonology
Rosemary Ellen Guiley
Ayn Rand's Atlas Shrugged - A Philosophical and Literary Companion
Edward W. Younkins
CK-12 Geometry
Ck-12 Foundation
Das Wörterbuch des NLP
NLP-Lexikon
The Secret Life of Bad Bishops
Esben Lund
We the Living
Ayn Rand & Leonard Peikoff