Peter Sergo

Quirky Minds: Invasion of the Body Snatchers

Delusions that make people feel dead—or maybe just surrounded by imposters.

PT Bookshelf: From Head to Toe

Reviews on books from sleeping to dreaming to eating.

With Friends Like These

Friends, new and old: The dark side of companionship.

Bookshelf: Head Trips and Evil Genes

Why some people are ruthless monsters and other reviews.