Diary of a Psychopath

Diary of a Psychopath is an American thriller-dark comedy book series written by Stella McDonnell, being published by from May 13th, 2009 until October 10th, 2018.

Synopsis
A former model goes down a path of crime after she testified for killing her abusive boyfriend. As a result, she becomes a psychopathic killer out to kill anyone who gets in her way.

Books

 * 1) Diary of a Psychopath (2009)
 * 2) Diary of a Psychopath: When in Vegas (2011)
 * 3) Diary of a Psychopath: A Very Psycho Christmas (2013)
 * 4) Diary of a Psychopath: World Tour (2015)
 * 5) Diary of a Psychopath: Finale (2018)

Main

 * /Lauren Rose/ - an insane and calculating former model who becomes a serial killer to anyone and everyone.

Supporting

 * Darren Johnson - a prison inmate who Lauren gains a crush on.
 * Betsy Rose - Lauren's sister who aids her with her plans to kill many people while trying to get a boyfriend.
 * Detective Daniel Marston - a detective who investigates Lauren's activities and aims to help her to control her insanity and become a normal person.
 * Dr. Lori Smith, Ph.D. - a psychiatrist who Lauren usually visits to talk about her problems and tries to keep TBD.
 * Joan TBD - a [TBD] who TBD.

Antagonists

 * Victoria Morrison - another former model turned psychopath who aims to become the most beautiful model by killing and ripping the faces out of models.
 * Justin Blackheart - Lauren's abusive ex who she murdered, with him appearing mainly in her mind, sometimes manipulating her.
 * Arthur Reynolds - a gangster who is rather calm and usually TBD.

Film adaption
confirmed on Twitter in 2017 that he is developing a film adaption on the first book.

The film is being developed by Paramount Pictures and it's expected to be released on TBD 2020.

On February 14th, 2018, it is revealed that Emma Watson was casted in the role of Lauren. A few weeks later, Zac Efron was confirmed to be Justin Blackheart. In April of the same year, Emilia Clarke was casted as Betsy.