Victor Acevedo rarely seen CD ROM material from M.C. Escher's Legacy: A Centennial Celebration 2003.

https://studylib.net/doc/14673853/space-time-with-m.c.-escher-and-r.-buckminster-fuller-vic...

Victor Acevedo at the British Museum, London, on 30 May 2001 (Photo by Mica Polovina)

The above link takes you to the rarely seen CD ROM material that accompanied the 1st edition of the book, M.C. ESCHER'S LEGACY: A Centennial Celebration. Published 2003 by Springer-Verlag, it is a collection of articles coming from the M.C. Escher Centennial Conference in Rome 1998. It is still available via Amazon Books: https://tinyurl.com/35khajv4