I have just taken a look at my bookcase and most of the titles I see tend to have a few things in common;
1) They are short
2) They are evocative, and indicate the tone and subject matter of the book
3) The title is often (but not always) part of a significant phrase or line that appears in the text itself.
Examples; Cocaine Nights (J.G. Ballard), Killing Floor (Lee Child), Porno (Irvine Welsh), Bright Lights, Big City (Jay McInerney).
Some titles manage to summarise the themes of the book and the personality of the main character, e.g. Philip Roth's Sabbath's Theater (sic), a difficult and impressive trick to pull off.
Some are wilfully stark and blunt, like David Peace's quartet; 1974, 1977, 1980, & 1984. They ain't even words. They is just numbers!
Some book titles definitely have the feel of being working titles that just stuck. Ghost Story (Peter Straub) feels like one to me, the sort of vague descriptive label you come up with in the early stages that ends up just feeling like the right choice.
Another tried and tested alternative is to quote someone, a fragment of Shakespeare always adds a spurious air of erudition to a book title, but quoting a more obscure poet would be better.