I am is the author of Linear Algebra Demystified, Quantum Mechanics Demystified, Relativity Demystified, and A Beginner's Guide to Mathematica. He holds advanced degrees in physics and mathematics and works as a consultant at Sandia and Los Alamos National laboratories. He has worked on space nuclear propulsion, the ITER fusion project, optics, and quantum information theory. More information about my books including sample text can be found at http://www.davidmcmahonbooks.com/