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. Paddy Morrissey was senior illustrator for CornerHardware.com. All three live in the San Francisco Bay area. Douglas Hansen lives in Palo Alto, CA.