The Essence of Chocolate' by Scharffen Berger Chocolate founders, John Scharffenberger and Robert Steinberg is a `culinary memoir duet' where the principal authors take the roles more of `Executive Producer' than true writer or even editor. Most of the recipe writing chores are assumed by a fairly large stable of well-known chocolatier practitioners such as Alice Medrich and David Lebovitz plus a number of other culinary luminaries such as Rose Levy Beranbaum, Michael Chiraello, Michael Richard, Jacques Pepin, Thomas Keller, and Rick Bayless. Most of the yeoman's work on the book appears to have been done by Suzie Heller (a collaborator with Jacques Pepin and Thomas Keller), the recipe tester and (I suspect) editor, Ann Krueger Spivack (a collaborator with Cat Cora and Michael Chiarello), and `Bouchon' photographer, Deborah Jones.