Geometric Algebra For Computer Science, An Object Oriented Approach to Geometry, published by Morgan Kaufmann Publishers http://geometricalgebra.net

David Hestenes: New Foundations for Classical Mechanics https://www.amazon.com/Foundations-Classical-Mechanics-Funda...

Geometric Algebra on euclideanspace.com by Martin John Baker: http://www.euclideanspace.com/maths/algebra/clifford/index.h...