Other worlds: spirituality and the search for invisible dimensions

Introduction: Science and heavenly realms: Edwin Abbott's otherworldly visions

The man who saw the fourth dimension

New heaven, new earth

Cathedrals without walls

Max Weber and the art of an invisible geometry

The spacetime of dreams

Mirrors, doorways, and otherworldy openings

Madeleine L'Engle disturbs the universe

One step beyond

Epilogue: The astonishing afterlife of a square.