Into the Darkest Corner is an intense, psychological thriller that had me reading long into the early morning hours. The present has Catherine dealing with a crippling case of OCD as well as post traumatic stress syndrome following her involvement in an abusive relationship. An alternating timeline is of a younger Catherine, a bit of a party girl, who falls in love with a charming, charismatic mystery man, whose dark and abusive side insidiously and quickly traps her in a situation that she can't escape.