Regarding Ducks and Universes

On a foggy Monday in 1986, the universe suddenly, without warning, bifurcated.

Fast-forward to 35 years later: Felix Sayers is a culinary writer living in San Francisco of Universe A who spends his days lunching at Coconut Café and dreaming of penning an Agatha Christie-style mystery. But everything changes when his Aunt Henrietta dies, leaving Felix a photograph which proves that he was born beforethe bifurcation, not after, as he had been told. He has an `alter' in Universe B.

Panicked that his mystery novel may have been penned already by his alter, Felix crosses to San Francisco B and proceeds to flagrantly violate the rules of both worlds by snooping around his alter's life. But when he narrowly escapes a hit-and-run, it becomes clear that someone knows he's crossed over...and whoever it is isn't happy about it. Now Felix must uncover the truth about his alter, the events of one Monday, and a wayward rubber duck before his time in both worlds runs out.