Astrid has always dreamed of adventure.
In the seaside village of Stony Brook, she is known as an inventor, a tinkerer, and very often the cause of unexpected explosions. But when she discovers a glass bowl large enough for a human head, Astrid creates her greatest invention yet: a homemade diving suit that will take her beneath the waves. What she finds below is more extraordinary than anything she imagined. Hidden under the sea lies Pelagia, an ancient underwater kingdom of turtles, merfolk, coral cities and powerful currents. But Pelagia is in trouble. Its crown is broken, its throne stands empty, and two heirs are locked in a struggle to decide who will rule the deep. As Astrid is drawn into the mystery, she must navigate strange alliances, ancient machines, dangerous trials and secrets buried beneath the coral. With the fate of the underwater kingdom hanging in the balance, one young inventor may be the only person brave and odd enough to help save it. The Turtle War of Succession is a whimsical fantasy adventure filled with invention, humour, heart, mermaids, turtles and a wonderfully strange world beneath the sea.