Z! Inspired by Ron Roy's A to Z Mysteries series, this exciting animal adventure mystery is perfect for budding young chapter book readers. This time, 8-year-old Abbi and her friends solve a mystery with the help of dolphins!

It's the weekend -- a perfect day for a sail off the coast of Maine. But there's something fishy going on with the local dolphins and Abbi, Lydia, and Daniel are determined to find out why. Are the dolphins twisting, leaping, and whistling because they're playing? Or is it a warning of nearby danger? And if it's danger, how can the kids get grownups to believe them? Abbi and her friends are diving head first into this mystery!

Don't miss the first books in the A to Z Animal Mysteries series:

• #1: The Absent Alpacas
• #2: Bats in the Castle
• #3: Cougar Clues

Ready for more? Check out the original A to Z Mysteries series by Ron Roy!