The New York Times bestselling author of the Peter and the Starcatchers and Kingdom Keepers series, Ridley Pearson, brings us the riveting first tale of the Lock and Key trilogy about the origins of the rivalry between literature's most famous enemies—Sherlock Holmes and James Moriarty, told from the perspective of James's observant little sister, Moria.

Before James grew up to be a ruthless, remorseless villain, he was a curious boy from Boston, with a penchant for trouble and an acid tongue. Thrown into a boarding school against his wishes, James winds up rooming with a most unlikely companion: a lanky British know-it-all named Sherlock Holmes ("Lock" to his friends). An heirloom Bible, donated by the Moriarty family more than a hundred years ago, has gone missing, and it doesn't take long for the two to find themselves embroiled in the school-wide scandal.

The school is on lockdown until it's found, strange clues keep finding their way to James, and a secret society lurks behind it all. It's a brave new reimagining of the Sherlock Holmes series as only master of suspense Ridley Pearson could envision. As Rick Riordan, author of the Percy Jackson series, says, "This tale will change the way you see Sherlock Holmes and leave you dying to know more."