Timeless by Gail Carriger (Japanese Edition)
アレクシア女史、埃及で木乃伊と踊る is the Japanese edition of Timeless, book five in The Parasol Protectorate series. It’s 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