Helping out at an animal rescue centre over the summer, she meets a dog, Silver, who is as shy and wary as she is: they quickly become inseparable. One evening, there is a break-in at the rescue centre, and when Silver smells danger, he transforms into a wolf in a flash of blue light, to protect Luna.

She discovers that her scientist mum was involved in a top secret project to create super pets, including a dog turning into a wolf, a gecko into a crocodile, a cat into a tiger. But the director of the project wanted to sell these animals to collectors on the black market: Luna's brave mum released them into the wild to foil this plan - and now the villain is hot on their trail, determined to capture them again. Luna discovers that she has the ability to power-up the animals; and that she's the hero they need to protect them and stop the villain!

From the bestselling author of the Lightning Girl series, Star Switch and Girls Rule Smart, funny and starring wonderfully real and relatable characters Perfect for all kids who love their pets, or long for one!