But the evil scientists – and their evil cats – are hot on his tail. When they mouse-nap his friend Mikayla, it's up to Isaiah and Hailey to rescue her.

Their search takes them on a cross-country adventure, facing foes and making unexpected friends. If they find Mikayla, they might even manage to free Isaiah's siblings and create a happy ending for all of the lab mice. This endearing and whimsical tale from bestselling author James Patterson is a celebration of bravery and determination in all shapes and sizes.