The Underground Ghosts (Haunted Library #10)

Dori Hillestad Butler's books have appeared on children's choice award lists in 18 different states. Trading Places with Tank Talbott won the Maryland Children's Choice Award in 2007, and The Buddy Files: Case of the Lost Boy won the 2011 Edgar Award for Best Juvenile Mystery. Dori has also been a ghostwriter for the Sweet Valley Twins, Unicorn Club, and Boxcar Children series, and a children's book reviewer for several publications. She's published numerous short stories, plays, and educational materials, and has served as the Iowa Society of Children's Book Writers & Illustrators' Regional Advisor. She grew up in southern Minnesota and now lives in Seattle with her husband, son, dog, and cat. She visits schools and leads writing workshops all over the country.