I like the tip of the hat to Terry Pratchett's L-Space (http://disc.osiris-web.com/mediawiki/index.php/L-space http://disc.osiris-web.com/mediawiki/index.php/L-

I like the tip of the hat to Terry Pratchett's L-Space (http://disc.osiris-web.com/mediawiki/index.php/L-space http://disc.osiris-web.com/mediawiki/index.php/L-space) idea of large quantities of books warping space and time.