An anthology conceived by Daniel Kwan and Daniel Scheinert that moves through the five prevailing multiverse theories, told by writers, scientists and illustrators. It includes a foreword by Ted Chiang, an alternate opening to Everything Everywhere All at Once, an essay by Sasha Sagan, and excerpted writing from Jorge Luis Borges, Alan Watts and David Eagleman. Also featured: three short stories by Esmé Weijun Wang, Etgar Keret and Emily Segal that begin with the same sentence; chapter openers and science consulting by Natalie Wolchover; parallel short fiction by Billy Chew, Julia Pott and Daniel Kwan; an original comic by Lizzy Stewart; a conversation between three quilters on a quilted theory of the multiverse; and an interview between the Daniels and David Eagleman.