In 1665 London, fourteen-year-old Christopher Rowe, apprentice to an apothecary, and his best friend, Tom, try to uncover the truth behind a mysterious cult, following a trail of puzzles, codes, pranks, and danger toward an unearthly secret with the power to tear the world apart.

"Sixteen-year-old Joan Sands is a gifted craftswoman who creates and upkeeps the stage blades for William Shakespeare's acting company, The King's Men. Joan's skill with her blades comes from a magical ability to control metal-an ability gifted by her Head Orisha, Ogun. Because her whole family is Orisha-blessed, the Sands family have always kept tabs on the Fae presence in London. Usually that doesn't involve much except noting the faint glow around...

In 1683 London during the Great Frost, thirteen-year-old Thomasina and her friend Anne stumble upon Father Winter's icy kingdom where Thomasina gets a chance to make a wish--to bring her twin brother back from the dead--that has dangerous consequences.