They were married in the womb...

Doctors David and Michael Ross. Incredibly handsome, brilliant, successful. Mirror images. Except one was masterful, aggressive, ruthless; the other gentle, decent, giving. They shared everything--even their sexual conquests. They switched identities--for pleasure, for profit, for spite. And to the woman who loved one and feared the other, they were at first a mystery she knew she must solve, and then a force she desperately tried to fight. But no one except themselves knew the whole truth in its full shattering horror.

Twins is a spellbinding novel of the bizarre lives and shocking deaths of twin doctors--bound together by more than brotherly love, damned together to a private hell of unspeakable obsessions. Made into the motion picture Dead Ringers by David Cronenberg.