Eleanor Herman

Katerina, on a mission to kill the queen, falls in love with Alexander, Prince of Macedonia. Jacob will go to unthinkable lengths to win Katerina, even if it means having to compete with Hephaestion, a murderer sheltered by the prince. And far across the sea, Zofia, a Persian princess and Alexander's unmet betrothed, wants to alter her destiny by seeking the famed and deadly Spirit Eaters.

Traces the history of poison in centuries of royal courts, from the intentional posionings to the unintentional side effects of commonly used makeup and medications.