While ordering books online, I stumbled across Dash & Lily’s Book of Dares. It was published in 2010 and written by Rachel Cohn and David Levithan. It’s their third collaboration, after they wrote Nick and Norah’s Infinite Playlist in 2006 and Naomi and Ely’s No Kiss List in 2007. This story is written in the dual perspective of the two main characters: Cohn writes Lily’s voice and Levithan created and wrote Dash.