Lisa Fiedler is the author of many novels for children and young adults. She divides her time between Connecticut and the Rhode Island seashore, where she lives happily with her very patient husband, her brilliant and beloved daughter, and their two incredibly spoiled golden retrievers.

Vivienne To has illustrated several books, including The Underland Chronicles by Suzanne Collins and the Randi Rhodes, Ninja Detective series by Octavia Spencer. As a child, she had two pet mice escape. She currently lives in Sydney, Australia, with her partner and her ginger cat. Visit her at VivienneTo.com.

Althought Felina the cat queen is gone, the subway tunnels are still dangerous, not only because of Hopper's rogue brother Pup and his arachnid companion Hacklemesh, but also due to a secret Firren has been hiding that worries her more than the disappearance of her daughter, Hope. Includes a bonus story, Atlantia rising: how it all began.