The national bestselling author of The God Equation takes us on a thrilling journey to explore black holes and time machines, multidimensional space and the pos

Explores the degree to which a belief in parallel universes shapes the thinking of contemporary physicists in areas as diverse as relativity, psychology, quantu

Quantum physics has revealed that objects can exist in more than one location simultaneously, even though the objects are invisible to us in all but one locatio

This suspenseful and moving memoir of Africa recounts the experiences of Alma Gottlieb, an anthropologist, and Philip Graham, a fiction writer, as they lived in

The vibrant daily lives of West African villagers, and the parallel, invisible realm of spirits that surround them.