I want a book where detective is solving a mystery but he has no problem of stepping over the line, breaking the law, working with criminals or even killing them to solve the case. by JacobJ1357 Related: A book where the protagonist was a dhampir Need well written Fiction books. Preferably a long book or series. Preferably finished. Book with an unsolved mystery? Based on my favorite books listed below, what other books might I enjoy reading? Best books to read poolside