I don't know if this would be a better question for physics.SE, but I'll try here first:
There is at least one good book on classical mechanics using the geometric algebra/ calculus (GA): New Foundations in Classical Mechanics by David Hestenes.
Likewise there is at least one good book on classical E&M using GA: Understanding Geometric Algebra for Electromagnetic Theory by John W. Arthur.
My question is, is there some analogous book for quantum mechanics? I know that spinors are often used in QM, and knowing that spinors are a natural part of GA, I wonder if there is any textbook which develops QM from this formalism from the beginning.
I would appreciate any suggestions. :)