I have just finished a new book published by the National Association of Attorneys General entitled: "State Attorneys General Powers and Responsibilities." It is edited by long time NAAG Counsel Emily Myers and by Former NAAG Exec Director Lynne Ross. It is an excellent compendium of the entire sweep of duties facing all state attorneys general. The book does not purport to engage in any of the debates that swirl around the office, but it is the best place to start.
Emily Myers also drafted five of the twenty three chapters and deserves special credit for bringing into existence this much needed revision of the First Edition that came out over twenty years ago. Any serious student of the Office of State Attorney General should purchase this new copy directly from NAAG.