Take a photo of a barcode or cover
A review by infinimata
Gödel, Escher, Bach: an Eternal Golden Braid by Douglas R. Hofstadter
5.0
Where *is* my mind, exactly?
http://www.genjipress.com/2011/02/godel-escher-bach-an-eternal-g.html
http://www.genjipress.com/2011/02/godel-escher-bach-an-eternal-g.html