Redwood Kardon, who devised and wrote the first Code Check, is a former electrician and building inspector for the city of Oakland, CA. Coauthor Douglas Hansen is a general contractor and certified combination inspector with over 25 years of field experience. Skip Walker is a certified residential combination inspector, with a particular interest in smoke alarm performance issues and deck safety. The authors present seminars and classes nationwide on a wide variety of building topics. Paddy Morrissey, former senior illustrator of CornerHardware.com, has been the sole illustrator for the Code Check series since its inception.