First published in 1905, The Amethyst box is a thrilling mystery by best-selling author Anna Katharine Green. On the night of his wedding, Sinclair finds his amethyst curiosity box with a little phial containing one drop of poison missing and he feels it was taken by only be one of two people: his intended wife, or her cousin, Dorothy. He goes to his friend Mr. Worthington and together they fight against time to find who has the poison and stop them using it. Too late, whoever took it has used it and now there is death in the house, is it a suicide or murder?