Refers to a legal treatise, Patents & the Federal Circuit, detailing the jurisprudence of that court originally written by the late Robert L. Harmon and now, in its 11th Edition, maintained by two former colleagues of Harmon, Cynthia A. Homan and Charles M. McMahon. Many practitioners regard the book as superior to Chisum and considerably more compact – though a much heavier volume than when first published and much more expensive. In law firm libraries it has a certain elusive quality, which leads to periodic missions to locate and retrieve it from colleagues’ desks.