We’ve read — or at least skimmed — hundreds of books about sex in our ten years in the biz, and our shelves are stacked with tomes on everything from gays in the military to the science of seduction. Some educate us, some make us laugh, some make us blush, some make good door-stops — and then every now and then, a book just completely blows us away. Like Daniel Bergner’s The Other Side of Desire. It’s an engrossing, sensitive, intelligent exploration of various forms of lust and longing, and it is by turns shocking and moving — and occasionally even romantic. Bergner hangs his story on four main characters: a foot fetishist, a female sadist, a child sex offender, and an amputee “devotee.” We chatted with him about furries, the Craigslist killer, and the age-old nature vs. nurture debate.