The book blog at The Guardian wonders if a recent spate of similar names for different books means we are running out of book titles.
Probably not, since there is pretty much no way for us to use up every combination of words possible in the English language any time before the sun goes nova. Add in them there furrin tongues and you've got a pretty much inexhaustible list of possibilities.
Now, if you want titles that make sense, you limit your options. But since creativity doesn't seem to be the strong suit of a lot of people littering the shelves these days, making sense is probably a ways down on the priority list.