Ever since its first edition in 1970, this book has led the way in demystifying the underpinnings of mental health "expertise" for attorneys and in chastening would-be experts to demonstrate rigor in their work. Working closely with Mae Ziskin, David Faust has assembled a team of experts to produce a superb 2012 6th edition. The substantial single volume truly represents a classic reborn with the most recent and digestible information from A (admissibility of expert testimony) to Z (interpreting Z-scores). No civil litigator, criminal law, or divorce attorney will want to cross-examine a mental health expert without it. No competent clinician or behavioral scientist should dare to take the witness stand without referring to it.