For anyone involved in the digitization of music rolls, this is highly recommended reading (170 pages, ISBN 978-3-948808-38-9, retail price €34.90, ISSN 2365-9149) from the Deutsches Museum’s “DM Studies” series, written by Judith Kemp. This comprehensive survey, from the beginnings of music roll digitization to the recent past, is based on months of research and interviews with leading experts worldwide. The printed book can be ordered on the Deutsches Museum website. A PDF version in English is available for free download.