Sarah Dessen’s “Infinity” is about a girl confronting two major milestones: getting her driver’s license and losing her virginity. The Dead Girls in Jacqueline Woodson’s “Nebraska 99” have already decided to “do it” and must now cope with being teenage mothers. And Carolyn Mackler’s “Mona Lisa, Jesus, Chad, and Me” explores whether friendship can survive when partying and prayer clash. Also included is a new Jessica Darling story by Megan McCafferty about the last fifteen minutes Jessica spends—or rather, doesn’t spend—with her best friend, Hope, who is leaving Pineville. Featuring stories by Steve Almond, M. T. Anderson, Julianna Baggott, Cat Bauer, Emma Forrest, Tanuja Desai Hidier, David Levithan, Sarah Mlynowski, Sonya Sones, Zoe Trope, Ned Vizzini, and Joseph Weisberg.