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!

X is for X-Ray . . . X marks the spot! When the kids go to a concert, Dink injures his arm. At the same time, the singer's diamond necklace is stolen. Are the two mishaps connected? And could Dink's X-ray have the answers? It's up to Dink, Josh, and Ruth Rose to examine the evidence!