The Bob Dylan album, Freewheelin', "with the 4 deleted tracks", that Jack presents to Kate is a rare collector's item. One recently changed hands for $30,000.
Jack Taylor's informant named China is a nod of the head by author Ken Bruen in his first novel (2001) to author Alan Hunter's original informant character named China, in the George Gently series of novels, first published in 1955.