Sign Language Interpreting: Exploring Its Art and Science (2nd Edition)

While this book could stand an update, it is a good overview of the interpreting profession with lots of helpful information (granted, some of which you can find by doing simple Web searches). Anyone thinking about becoming an interpreter would do well to read this book to get an understanding of the history of the profession or to perhaps effectively advocate for better pay rates or working conditions for interpreters. (most of an interpreters work is done in the prep time for a job, but interpreters only get paid for actual on site interpreting time... hmm, perhaps a paradigm shift should be in the works, if all interpreters work together to make that happen.)