Websites for Book Lovers

(V1.0) Here is an arbitrary list of arguably the very best websites for book lovers, bookworms and afficiandos of the written word. 
My Favourites (detailed descriptions are in the individual sections)

Rare Book Room - I can’t explain how cool it is to be able to look at and read all these rare books online I was looking at a [...]

The end of the book world as we know it?

DETROIT - Borders could become the latest victim of the credit squeeze, announcing Thursday that it may put itself up for sale. Rival Barnes & Noble, meanwhile, saw fourth-quarter profits drop 9 percent as the industry struggles with intense competition from discounters.
Read all about Borders’ woes on Yahoo News. 
Wow - i can’t imagine a world without Borders. [...]