The Adventuress — Carole Nelson Douglas

Diva/detective Irene Adler and her bridegroom, handsome barrister Godfrey Norton, are honeymooning in Paris when they become embroiled in an investigation: a drowned sailor's body has been recovered from the Seine, and on his chest is a tattoo. A tattoo like one Irene once saw in London -- on another sailor's chest, while the corpse lay upon Bram Stoker's dining room table. This clue will lead Irene to the first beautiful blond American princess of Monaco, political and matrimonial treachery, and a sword duel as she and her new friend, Sarah Bernhardt, unravel the mystery -- with, of course, the help of Godfrey, Irene's faithful chronicler Miss Penelope Huxleigh, and Sherlock Holmes himself.
(formerly Good Morning, Irene)