800 years ago, the plague nearly destroyed Europe.

Today, the Map of Plagues will destroy our world.

Sienna Farren has enough to worry about: she's the newest Mapwalker, burdened with protecting our world from the intrusions of the magical Borderlands. She's struggling to figure out her feelings for Finn, a Borderlander who may be a friend – or could be trying to turn her over to his father, a power-mad Warlord of the Borderlands.

Worst of all, every time Sienna uses her magic, she falls a bit deeper into Shadow – into a place where she will stop being a Mapwalker and become a Shadow Cartographer, one of the evil magic-users who constantly threaten the map of our reality.

But when a fragment of a deadly map is recovered from a medieval plague pit in London, Sienna knows it's time to fight again. Because the map is just one piece of a larger whole: the Map of Plagues. And if the Shadow Cartographers find the remaining pieces, they can use it to bring down a plague on our world.

A plague that would kill millions. A plague that would rewrite the maps of history.

A plague that could finally allow the Borderlands to overrun our world, and destroy us all.

New York Times and USA Today bestselling author J.F. Penn continues her fantastic Mapwalkers series with Map of Plagues – and mixes magic, history, adventure, and lore in a way only she can. Click "Buy Now," and discover a new map to adventure!