13 is a musical with lyrics and music by Jason Robert Brown and a book by Dan Elish, with Robert Horn newly joining as co-librettist. The story concerns the life of 13-year-old Evan Goldman as he moves from New York City to Appleton, Indiana, and his dilemma when the move conflicts with the celebration of his Bar Mitzvah. It premièred in 2007 in Los Angeles and transferred to Broadway on September 16, 2008.