Rachel Cohn was born in Maryland but now also lives in New York. Her first novel, Gingerbread, was published in 2002. Since then she has gone on to write many other successful YA and children's books, three of which were in collaboration with David Levithan.

David Levithan was not born in France, Milwaukee or Olympia, Washington. He did not go to Eton, Harvard Law School or Oxford University. He is not the author of War and Peace, Hollywood Wives: The New Generation or The Baby-sitters Club #8: Boy-crazy Stacey. He has not won the Newbery Medal, the Pulitzer Prize, the Bausch & Lomb Science Award or the race for eleventh-grade vice president. He currently does not live in Manhatten.

Sam and Ilsa Kehlmann have spent most of their high school years throwing dinner parties, and now they've prepared their final blowout, just before graduation. The rules for the twins are simple: they each get to invite three guests, and the other twin doesn't know who's coming until the guests show up at the door.

Sam and Ilsa Kehlmann have spent most of their high school years throwing dinner parties, and now they've prepared their final blowout, just before graduation. The rules for the twins are simple: they each get to invite three guests, and the other twin doesn't know who's coming until the guests show up at the door.

With Sam and Ilsa, the sibling revelry is always tempered with a large dose of sibling rivalry, and tonight is no exception.

One night. One apartment. Eight people. What could possibly go wrong? Oh, we all know the answer is plenty. But plenty also goes right - in rather surprising ways.