From an Article by Kevin Newcomb on Time.com:
The [bookless library] trend began, naturally, with engineers, when Kansas State University’s engineering library went primarily bookless in 2000. Last year, Stanford University pruned all but 10,000 printed volumes from its new engineering library, making more room for large tables and study areas. And the University of Texas at San Antonio ditched print in lieu of electronic material when it opened its engineering library in 2010.
But when books disappear, does a library lose its definition?