There are a large number of individuals who have helped me with this book. They will eventually be thanked here. Until then, some random collection: Rick Antle. Donna Battista. Randolph Beatty. Wolfgang Bühler. Kangbin Chua. Diego Garcia. Stan Garstka. Roger Ibbotson. Ludovic Phalippou. Matthew Spiegel. John Strong. Julie Yufe. Many anonymous victim students using earlier error-ridden drafts. Most importantly, Mary-Clare McEwing helped me improve the book.