“Every surface, every bit of air, every bit of water in your home is alive,” says scientist Rob Dunn. His new book, ‘Never Home Alone,’ examines the bacteria, fungi, viruses, parasites and insects we live with — from armpit bacteria to black mold in our walls.

Book critic Maureen Corrigan reviews ‘A Ladder to the Sky’ by John Boyne. She calls it “maliciously witty, erudite and ingeniously constructed.“