Hold on to your hats people! Things are getting serious. Like with the previous books in the series, PERFECT picks up the story right where FLAWLESS left off. If you have been disappointed by a book series in the past that dwindled in excitement, be assured that the PRETTY LITTLE LIARS series isn't going to let you down. The story continues to follow Hanna, Spencer, Aria, and Emily as they attempt to find out who keeps sending them threatening messages and exposing their deepest, darkest secrets to their friends and family. The police renew their efforts in the investigation of Alison's death and begin to question the girls about the night she disappeared again. A video that Aria took while they were all still friends is leaked to the media and leads Aria to discover the secret Ali was keeping from all of them. Spenser begins therapy in order to deal with the stress of everything and discovers a horrible secret as well. Hanna, however, receives the biggest clue and actually knows who the killer is by the end of the book, but is unable to tell anyone because of a terrible accident that leaves her in the balance between life and death. Personal issues escalate for each of the girls too. Emily has to do more self searching about her feelings for Maya. Spenser has to deal with the aftermath of turning in her sister's papers as one of her own. Hanna becomes shunned by her best friend and stresses over the fact that she is putting on weight and Aria finds her feelings for Ezra aren't as resolved as she thought they were. Through every new development "A" is there taunting and threatening. By the end of PERFECT it doesn't seem like it can get any worse. I'm sure Sara Shepard has more surprises in store for us in the next installment of this wonderfully, suspenseful series. UNBELIEVABLE is due to come out in March 2008.