The authors of this book are Walter H. Fanburg, M.D. and Bernard M. Snyder, M.D. ( But when you have to fill in all the book information because the book does not have an isbn number, only the last name of the one writer shows up. WHY???? Also the isbn number shown in the description (41031), IS NOT THE ISBN NUMBER, the real isbn number is 671-21968-5, but the system would not accept that as an ISBN number. There does appear to be some flaws in the system.