The sheer tangibility of the book is a key. [definitional]
The book, the artefact, has proved exceptionally resilient through the centuries: surviving the collapse of the Roman Empire, the media change from manuscript to print, the Reformation and the Enlightenment, carpet bombing and numerous attempts to limit access to unacceptable texts. Most recently it has seen off many of the technological pall-bearers sent to conduct it to the crematorium: microfilm, the CD-ROM, and now the e-reader. The sheer tangibility of the book is a key element of its success, and its versatility: as manual, totem, encyclopaedia and source of entertainment.
Andrew Pettegree, Arthur der Weduwen, The Library- A Fragile Hist…, loc. 944