RON ROY has been writing books for children since 1974. He is the author of dozens of books, including the popular A to Z Mysteries®, Calendar Mysteries, and Capital Mysteries. When not working on a new book, Ron likes to teach tricks to his dog Pal, play poker with friends, travel, and read thrilling mystery books.

STEPHEN GILPIN is the award-winning illustrator of dozens of children's books, including the popular and very funny Pirate Mom. He brings his fresh, kid-friendly style to all the covers of the A to Z Mysteries® series.

Help Dink, Josh, and Ruth Rose solve mysteries from A to Z!

Kids love collecting the entire alphabet and super editions! With over 8 million copies in print, the A to Z Mysteries® have been hooking chapter book readers on mysteries and reading for years. Now this classic kid favorite is back with a bright new look!

D is for Dungeon . . . Get ready for a sleepover-in a castle! Soon after the kids arrive at Moose Manor in Maine, they hear strange sounds behind the walls. Does this castle have a hidden dungeon? And could it be haunted? Dink, Josh, and Ruth Rose are dying to find out!