The Obsession was a great foray into the mind of a teen with mental illness.  “She touched my hand, she wants me” haha.  And not only that, but self centered fickle impulsive teen behavior and thoughts.  I enjoyed the story and felt the mom’s boyfriend got his just deserts.  Delilah is smart and thinks on her feet.  I think there were a few plot holes, but it still got wrapped up quickly.  The ending was lightning speed and the book ended at 91% (read e version) to plug another novel set at the same boarding school.  I do think for a modern day novel, these kids were not glued to cell phones (barely mentioned) so unrealistic in that fashion.  But it was a suspenseful quick read. I enjoyed it.