Hypercomplex Numbers: An Elementary Introduction to Algebras
I. L. Kantor & A. S. Solodovnikov
Constructive Anatomy
George B. Bridgman
Dover Anatomy for Artist (1)
Portfolios of the Poor
Daryl Collins & Jonathan Morduch & Stuart Rutherford & Orlanda Ruthven
Linear Programming Beyond 4.2(Simplex Method)
Heckman C.C.
A Theory of Fun for Game Design
Raph Koster