Graham's MMPI2: Assessing Personality and Psychopathology is the gold standard. If you're a PsyD student, then skip his ad nauseam test construction details and go right for the clinical scales/ profile interpretation guide. If you are a PhD student, buy this book, give it a pet name and keep it with you at all times.
Butcher's Essentials of MMPI2 and MMPIA is ok, light weight and a better resource if your patient base is primarily YAVIS.
The MMPI (and its potential applications) is one of the things that set clinical psychology apart as a distinct and essential component of comprehensive health care. MD's can NOT do psychometric assessment (despite the misguided and misinformed medicare guidlines).