Authors: David Levithan and Rachel Cohn
Published: October 2010
Publisher: Random House

A brief synopsis; (via Goodreads)
“I’ve left some clues for you.
If you want them, turn the page.
If you don’t, put the book back on the shelf, please.”
16-year-old Lily has left a red notebook full of challenges on her favourite bookstore shelf, waiting for just the right guy to come along and accept its dares. Dash, in a bad mood during the holidays, happens to be the first guy to pick up the notebook and rise to its challenges.
But is Dash that right guy? Or are Dash and Lily only destined to trade dares, dreams, and desires in the notebook they pass back and forth at locations across New York? Could their in-person selves possibly connect as well as their notebook versions? Or will they be a comic mismatch of disastrous proportions?