"Complicated Watches and their Repair" by Donald de Carle, F.B.H.I. is a comprehensive watch repair book published in 1979 as part of the Bonanza series. Focusing on the repair of complicated watches from the 1970s, this book provides valuable insights and guidance for watch enthusiasts and professionals. With detailed instructions and expertise from the author, this book serves as a valuable resource for those looking to understand and maintain the intricate mechanisms of vintage watches.