Hysteria by Megan Miranda

Hysteria - panic, uncontrollable fear.  For Mallory, who had stabbed a young man to death, possibly to save herself, this means running anytime memories or memories of sounds associated with that fateful night come back.  Readers are just as confused as Mallory by her fleeting memory bits.  I was confused all the way to the very last 25 pages.  I think this was supposed to be a nail biter but I was mostly just confused.  Its easy enough to read and one feels compelled to keep going just to see if everything is explained.  It is, eventually.  Mallory is sent off to the same boarding school her father and grandmother had attended when the mother and brother of the young man who died begin to stalk her.  At the school she meets up with Reid, son of her father's best buddy.  She had met him years earlier and the memories return.  They do hit it off ok.  She also meets Jason, Krista, Taryn, Bree.  Something isn't quite right among the group.  There are secrets being held and lies being told.  Jason and Krista are particularly weirding out Mallory.  Then it happens again, another murder.  Mallory wakes up covered in blood, Jason stabbed to death on her dorm room floor.  This time she is sure she has had no part in the murder.  She was framed.  She is not allowed to go home while the murder investigation is going on so ends up in a motel near enough to campus for Mallory to run over there.  She does this several times, seemingly compelled to get the truth of both killings.  Her best bud from home, Colleen, is always there for her.  So it is that Colleen comes from home to visit at the motel.  Colleen gets involved with the attempt to figure out the truth of things and is nearly killed in the process.  This leads to those final 25 pages or so.  This is only an ok story but teens looking for a mystery that's a quick read may enjoy it. 
JDW 4/9/14