Hide and Seek is number eight in Michaels' Sisterhood series. I jumped into this one in the middle because this is the first book in a trilogy called Rules of the Game, but that trilogy is just part of the Sisterhood series. The book still made sense on it's own. Enough of the back story is filled in to generally understand what came before.
This novel focuses on the Sisterhood, also known as the Vigilantes, who try and bring down a vindictive corrupt FBI director. The women of the sisterhood are a varied group, from truck drivers and florists to judges and lawyers. By the time this novel appears in the series they're also media heroes. This series is a good read. I've already started the second book in this trilogy. Highly recommended.