This isn't a book review, but I thought those of you who are struggling to complete your Project Fill in the Gaps might appreciate this site with free audiobooks that are in the public domain. Lots of the classics.
I don't really think all books should be free, though. My rule of thumb is that if the author is alive, I buy the book new. If the author is dead, well . . .
A word of caution: because the readings are done on a volunteer basis, some books are better than others. RAT CATCHER, for example, sounds as though the reader is actually a computer. The sentences run together and the inflections are in all the wrong places. But OUR MUTUAL FRIEND sounds wonderful so far. Pay attention to the starred books and you'll most likely find a keeper.
I'll take this down if it's inappropriate. Just say so in the comments.