[yamtaddle]

It's caught some shit over the years, but it's hard to go wrong picking almost anything off Bloom's (IIRC somewhat reluctantly-compiled, at the request of the publisher) list from the appendices of The Western Canon.

There's another pretty good one, that includes more science writing and such, at the end of Adler's How to Read a Book.

Bloom's:

http://sonic.net/~rteeter/grtbloom.html

Adler's:

http://sonic.net/~rteeter/grtadler.html

And that site has a bunch of other lists in a similar spirit, on it.

[EDIT] One thing to beware of with free ebooks and non-English works in translation, is that it's pretty common for older public-domain translations to be needlessly-obtuse to a modern reader, or outright bad. Worth taking a few minutes to compare your options before committing to one of those.