Book 2 in the series.Art Historian Nicolas Halstead never could have imagined a book Leonardo da Vinci created for his lover Salai existed, let alone lead to subtle declarations of love worked into da Vinci masterpieces. Nor did he picture himself a married man in a polyamorous relationship.Happy and content, lovers Nicolas, Ellie, and Luca embark on a quest to learn all they can about the greatest mind of the Renaissance. But their world takes a devastating and deadly turn that sends Nicolas into the seedy deviant underworld of Victorian London. It soon becomes clear that Conte Acario Bruno lives, and the madman wants far more than Leonardo's book. He wants Nicolas dead and Luca for himself.