The first book in the Pretty Little Liars series is entitled "Pretty Little Liars." It was written by Sara Shepard and published in 2006.
The novel follows the lives of four teenage girls - Aria, Spencer, Hanna, and Emily - who are reeling from the disappearance of their friend Alison DiLaurentis. One year after Alison's disappearance, the girls begin to receive mysterious messages from an unknown sender named "A" who knows all of their deepest secrets.
As they try to uncover the identity of "A" and what happened to Alison, the girls are forced to confront their own secrets and lies. Their once-perfect lives are turned upside down as they navigate through the twists and turns of the mystery, all while trying to protect themselves from the threats of "A."
"Pretty Little Liars" is a thrilling and suspenseful novel that keeps readers on the edge of their seats. The book is the first in a series of 16 books, as well as a television series adaptation that ran from 2010 to 2017. If you're a fan of suspenseful young adult novels with complex characters and high-stakes drama, then "Pretty Little Liars" is definitely worth reading.