J.F. Penn wrote a fast-paced, dark fantasy thriller about a young woman named Sienna that belongs to a family of mapmakers and their connection to another world called the Borderlands. Map of Shadows is the first book of the trilogy and does a solid job of setting up the conflict between the people of this world and the Borderlands. Penn does an excellent job with the thriller aspect of the story but I will admit that I wanted to get to know Sienna, the protagonist a little more. It felt like she was more of a conduit to the story then being the main reason for the story. I hope to get more about her in the Map of Plagues and the third book. There is a lot of room for Sienna to grow as a mapmaker. Solid opening to this trilogy.