The Brass Queen by Elizabeth Chatsworth Published by CamCat Books In 1897, a fiery British aristocrat and an inept US spy search for a stolen invisibility serum that could spark a global war. Miss Constance Haltwhistle is the last in a line of blue-blooded rogue inventors. Selling exotic firearms under her alias, the ‘Brass Queen,’ has kept her baronial estate’s coffers full. But when US spy, Trusdale, saves her from assassins, she’s pulled into a search for a scientist with