Andi Boggs and her best friend Colin Carter are at it again ... in this third book of the Andi Boggs series, Andi Unstoppable, school has begun for the two Killdeer middle schoolers and the science teacher has a great idea! He is an expert birder and wants his class to share in the fun. In a birding group with Colin and her biggest school rival, Ava, Andi sets out to be the first student in class to spot the elusive Kirtland warbler but ends up spotting the town's resident ghost instead!

Together with her friends, Andi takes on another small town mystery—is the legend of the ghost of Dominika Shalley more than just a story? And does her sudden appearance have anything to do with the holes the friends find in the Shalley graveyard as they look for the rare bird?