I bought the 2006 version of the book at Barnes and Noble. I believe the link is available online for a charge. The book actually has several rankings in it: (Specialty rankings, Total indebtness, Financial Aid Packets, Selectivity, etcetera)
Greenshirt, you are correct, West Virginia is the only one in the top #50 for primary care (although I thought TCOM was in top fifty as well the last couple of years - maybe they dropped?).
Regarding the overall rank: It is ranked second to TCOM in the ranking for "selectivity" of schools. If I remember correctly, this is based on MCAT, GPA, and numbers applied versus accepted from the preceding class. All of the osteopathic schools are indeed listed on it, except for of course AT Still-AZ, DCOM, Touro-COM in NY, Touro-Nevada, LECOM-Bradenton, PCOM-Georgia, and AZCOM for their "new" factor.
Hope this helps - you can see the book the next time you are at a bookstore. 🙂