A typical hard cover or soft cover book will need attention at several stages in its library life, from minor mending to rebinding, and even boxing or digitizing when the paper becomes too brittle to repair or use. This manual will primarily focus on minor mending techniques that will extend access to the original book, in addition to addressing damage that impedes the use of the book. Conservation of a library’s circulating or general collections is a necessary and key collection management activity as well as a hallmark of an effective preservation program. This manual has been written to provide guidelines for selecting appropriate candidates for in-house book repair and introduce staff to some repair methods. In-house book repair is appropriate for general collections materials not needing complete rebinding by a commercial binding service. The advantages of repairing materials in-house are that high use materials can be returned to the stacks more quickly and simple repairs may often be done more economically.