The New York Times Bestselling duo behind Nick & Norah's Infinite Playlist and The Twelve Days of Dash & Lily return with twins out to throw the party of a lifetime--or at least the best party of high school!Siblings Sam and Ilsa Kehlmann have spent most of their high school years throwing parties for their friends--and now they've prepared their final blowout, just before graduation.The rules are simple: each twin gets to invite three guests, and the other twin doesn't know