Timeless by Gail Carriger (UK Edition)
This is the UK edition of Timeless, book five of the The Parasol Protectorate series. It is available here in mass market, signed by its author, Gail Carriger.
"The world of Timeless is a unique recipe of steampunk and fantasy spiced with light sprinkling of romance. Its setting is rich for characters to romp about in, but the unbridled playfulness of the language and dialogue shines brightest." -Miami Herald