On a foggy Monday in 1986, the universe suddenly, without warning, bifurcated. Fast forward to thirty-five 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 of his father and himself—dated ten days before Felix was born. It can only mean one thing: Felix has an “alter” in Universe B. Panicked that his mystery novel may have been written already, 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.

"Weaving together physics, philosophy, and wry humor, Maslakovic's inventive debut is a delight." - Booklist

"The story unfolds at a sprightly pace...clever combination of mystery, science fiction and humor gives this title broad appeal."
- School Library Journal

"A witty and light ‘what if’ novel stuffed with an amusing and eclectic cast of characters.” - Publishers Weekly

"Highly recommended." - Midwest Book Review