John Snow is a brilliant inventor who has made millions from his genius in aeronautics. He has everything a man could desire: wealth, family and even a beautiful mistress. But he also has a brain disease, a rare form of epilepsy that threatens his most valuable possession - his mind. Only one doctor may be able to cure it surgically, but at a terrible cost: He will have no memory whatsoever of his past and will be abandoning everyone he has ever known. But the night before he is scheduled to undergo the operation, Snow is found near the Massachusetts General Hospital, dead of a gunshot wound. Did he commit suicide, as the police suspect - or was he murdered?

A question that only forensic psychiatrist Dr Frank Clevenger will be able to answer as he delves into the genius' complex past and tortured relationships to unlock the identity of Snow's killer...

`Keith Ablow's setting is the darkest of all - the twists and turns of the human mind' Harlan Coben

`No one burrows into the darkest recesses of the human mind as deeply as Keith Ablow' Tess Gerritsen