Watch repair:
The watch repair manual, by Fried
Practical watch repairing, by De Carle
The Swiss Watch repairer's manual, by Jendritzki (This book is great, but don't pay more than $75. After Fried's book it pulls in all the information nicely.)
Bulova Repair Training Manual
Chicago school of watchmaking (There's no copyright on this course. A guy on EBay has been scaring people for years. He does not own the copyright.)
Bestfit encyclopedia of Watch Parts 1 & 2
The clock and watch makers guide to gear making
George Daniels Watchmaking
I'll be writing my own book in the future. It will be a modern take on the repair of mechanical watches. It will have a lot of pictures. It will be direct, and to the point.
If you are interested in watch repair; I would do it as a hobby. I couldn't imagine making a good living repairing watches.
The bigger watch brands do not want to sell spare parts. That just might change in the future? Right now, it looks dim. Rolex, and the Swatch Group basically want to dictate whom, and where you can elect to get your watch repaired. Most times it the factory, at factory prices.
If you get into watch repair throughly, your appreciation of watches might change. When there's no mystery, there's no magic, I guess?