Research). His research interests include data preservation, history of computing and paraconsistent reasoning, and overcoming the inability of computers to deal properly with inconsistent data. Delve and Anderson organize the book into six areas: why and what to preserve; memory institution/data archival perspective; approaches, practices, and tools; case studies; legal perspective; and pathfinder. This helps the reader gain a sense of not only the complexity of the digital objects but also the roles of responsibility. The book carefully defines what complex digital projects are and why they are important to preserve. It highlights some successes and failures the preservation community has had with these objects in order to establish best practices for future projects. These best practices focus on preserving technical environments, software, hardware, and practice by migration, emulation, exhumation, etc. It also draws attention to issues and problems still not solved such as copyright and other legal issues. The book is an interesting read with a focus on UK and European projects and somewhat lacking in U.S. initiatives. However, it is a well written and a valuable resource for the preservation field.