From the website:

"The European Library is a free service that offers access to the resources of the 48 national libraries of Europe in 35 languages. Resources can be both digital (books, posters, maps, sound recordings, videos, etc.) and bibliographical . Quality and reliability are guaranteed by the 48 collaborating national libraries of Europe.

The European Library service is for anyone world-wide seeking for library material; books of course but also book references, maps, photographs, music, videos, etc.

The European Library provides a vast virtual collection of material from all disciplines and offers visitors with interest a simple access to European cultural resources."