Interesting links

Library

World Digital Library: cultural heritage materials gathered during the World Digital Library (WDL) project, including thousands of items contributed by partner organizations worldwide as well as content from Library of Congress collections
See Inside 30 of the World's Most Beautiful Libraries: You'll want to read every book within these fabled halls.
The 12 Most Popular Libraries in the World

Rare Manuscript Digital Collection

Cornell University’s rare book and manuscript collections
Rare Book & Manuscript Library, The Columbia University
Beinecke Rare Book and Manuscript Library Digital Collections

Book cover evolution:

The evolution of book cover design
A Book Cover Comparison
Cover art comparison: us versus uk editions
The Battle of the Book Cover: U.K. versus U.S.
Judging Books by Their Covers 2015: US Vs. UK
Comparing Book Covers: UK vs US