My first book with Harlequin Romantic Suspense has an official title:
Hiding His Witness
I love it. So excited. Thrilled, in fact.
Most of the Harlequin books I've read have titles that clearly spell out what the book is about and mine is no exception. I had some other title suggestions, including one that my editor also had thought of and liked, but the title can't be too similar to other books due out around the time mine is released.