Recently I was reminded of a series of textbooks by Arnold Sommerfeld. When I was a young man, these were obligatory offerings at any respectable bookstore. I never purchased them because I had other things on my plate. Now I cannot seem to find them in print. I did find this assessment of these books: http://math.ucr.edu/home/baez/physics/Administrivia/booklist.html "Arnold Sommerfeld: Lectures on Theoretical Physics Sommerfeld is God for mathematical physics. " I always assumed that Sommerfeld's books were required reading for anybody who is anybody in understanding (the) Universe. Can these books be resurrected?