I'm a junior in electrical engineering so I have a good knowledge of the physics of electromagnetism. However, I do not take my electric power and machines class for another two semesters and am interested in learning about AC/DC motors and generators in my spare time. Can anyone recommend any good books? I want the book to go into fair detail on the construction of these devices, not just an overview of the physics. But I'm not looking for a textbook really, just something in the $50 range. Thank you.