books about the interview process? or books about medical ethics in case it comes up in an interview...there have been some threads about pre-med summer reading i think
If you're wanting to know what the actual interview process is for a particular school, the best way to go is to check out SDN's interview forums. They would be far more informative than a book would be, if I had to guess (plus the forums are free, whereas books cost money).
Some of it won't be relevant since it's aimed towards the next application process, but Iserson's Getting into a Residency has excellent advice on interviewing. I think it's a must-have for medical school anyway.