Lists galore

The Modern Library, lists of 100 best fiction and 100 best non-fiction books. Two version of each list, one chosen by a panel of critics, the other voted for by readers.

The BBC's Big Read, 100 novels voted for by BBC audiences.

Time Magazine's all-time 100 novels published between 1923 and the present, chosen by Time's critics.

Top 100 books of all time, via the Guardian, 'as determined from a vote by 100 noted writers from 54 countries'.

The top 100 books, via the Telegraph - no explanation of how they were chosen.

Another Telegraph one, the 110 books that make up the perfect library.

This one is interesting: the most downloaded books from Project Gutenberg.

Waterstones' top 100 books of the twentieth century.

And in response to the male-centricity of most of the above, the top 100 books by women, although I can't find the link to the original.