Many of today’s top writers of thrillers have spent untold hours in the actual forensics and crime fields, and Australian doctor and bestselling author Kathryn Fox is one of them. Dr. Fox will be signing her new book, Skin and Bone, in tandem with the Vineyard’s own celebrated maestro of the legal and police procedural, Linda Fairstein for her latest, Killer Heat (see right), at Edgartown Books today, July 4, at 3 p.m.