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The U.S. is short approximately four million homes. Wharton economist Ben Keys traces the beginning of the housing crisis to the 2008 financial meltdown � and says climate change is making things worse.

From excessive hygiene to low-fiber diets, author Theresa MacPhail explores the deep-rooted causes of rising allergy rates in her new book Allergic.

Journalist Glenn Greenwald says he and his team weighed the public's interest against the potential harm to innocent people when deciding how many of Edward Snowden's leaked documents to make public.

In Dark Invasion, Howard Blum explores the campaign of sabotage that Germany inflicted on an unsuspecting U.S. As ships and factories blew up, "no one really suspected a spy network," he says.

In Dragnet Nation, Julia Angwin describes an oppressive blanket of electronic data surveillance. "There's a price you pay for living in the modern world," she says. "You have to share your data."

A new biography reveals that young Thoreau took quite a few detours on his path to Walden. A gossipy young man who loved eating popcorn, ice skating and listening to his music box, schoolmates and neighbors found him standoffish and regarded his fascination with plants and Indian relics as downright odd.

Alena, a reworking of Daphne DuMaurier's Rebecca, takes place in the contemporary art world, while The Yellow Eyes of Crocodiles is a "delicious French romp." Critic Maureen Corrigan says both novels are "exquisite vehicles of escape fiction."

In a new book, The Anatomy of Violence, Adrian Raine argues that violent behavior has a biological basis just like depression or schizophrenia. This raises questions about treatment, accountability and punishment, including the death penalty.

In his book Glock: The Rise of America's Gun, Paul Barrett traces how the sleek, high-capacity Austrian weapon found its way into Hollywood films and rap lyrics, not to mention two-thirds of all U.S. police departments.

The first openly gay bishop in the Episcopal Church will start work with the Center for American Progress, focusing on issues of faith and gay rights. "Gay is not something we do," he says. "It's something we are." His book God Believes in Love: Straight Talk About Gay Marriage was published in September.