The Alchemist's Cipher

"Tell no one what I have given you." Until Christopher Rowe received this cryptic warning, he was content with his apprenticeship under Master Benedict Blackthorn – learning to solve complex ciphers and puzzles, and crafting potent medicines, potions, and weapons, apart from the odd explosion or two. But then a mysterious cult begins to stalk London's apothecaries. People start dying, and the danger creeps ever closer to their shop. Christopher must use everything he has learned to get to the bottom of it all and stop the evil from spreading. Will he uncover the key to a terrifying secret that could turn the world upside down?