Math You Can't Use : Patents, Copyright, and Software
Ben Klemens
Graphic Artists Guild handbook : pricing & ethical guidelines
Graphic Artists Guild (U.S.)
An Architectural Approach to Level Design
Christopher W. Totten
Eros and Magic in the Renaissance
Ioan P. Culianu
Hypercomplex Numbers: An Elementary Introduction to Algebras
I. L. Kantor & A. S. Solodovnikov