The Art Forger by B.A. Shapiro

The Art Forger by B.A. Shapiro is an in depth look into the world of art forgery. Even the masters signed their names on works done by their students so even an authentic signature doesn't guarantee an authentic work of art. Ms. Shapiro has done a great job at researching the art world and gives a detailed account of exactly how a forgery is accomplished.  She uses the theft at the Gardner museum to begin her story.

From the cover:
Almost twenty-five years after the Isabella Stewart Gardner Museum's infamous art heist - still the largest unsolved art theft in history - one of the stolen Degas paintings is delivered to the Boston studio of a young artist named Claire Roth. Claire, whose reputation has been tarnished by scandal and who now makes her living producing famous works of art for a popular online retailer, has entered into a Faustian bargain with Aiden Markel, a powerful gallery owner. She agrees to forge the Degas in exchange for a one-woman show in his renowned gallery. But as she begins her work, she starts to suspect that this long-missing masterpiece may itself be a forgery.