Liar, Justine Larbalestier

Micah is a young black woman at high school in New York, an habitual liar, and the first person narrator of this book. Which is a mixture of truth and lies; which is which, or which if anything is true, is up to the reader.

( I can't talk further about the book without spoiling it, which I do - if vaguely - behind the cut. I think it's worth reading, but it didn't really work for me; this response is individual enough for me to recommend it anyway, with caveats. )