I agree with btbam; I would not recommend studying an anesthesia text for interview prep.
The most worthwhile thing you can do is spend time formulating some articulate, genuine thoughts explaining WHY you want to be an anesthetist. Perhaps reading about anesthesia will help you do that, but I would not focus on attempting to parrot the minutia from a textbook.
The whole reason they offered you an interview was because they decided that you are capable of learning everything you need to know about anesthesia during anesthesia school. Knowing what the MAC of sevo is or what an APL valve does will not convince the interviewer grant you a spot.
If through your answers and conduct you demonstrate that you have the attitude, drive, and focus to make a good anesthetist, well, now your in business.....