Shark Wars by Ed Altbacker (author) (US edition)

Since the dawn of time, prehistoric shark clans called Shivers have ruled over the earth’s oceans, fierce protectors of all who swim. For eons, the Big Blue has prospered under Shiver Law, and the delicate balance of sea life has been kept sacred. Until now. Rising sea temperatures and overfishing have caused food to become scarce, and the battle for new hunting grounds has brought corruption and warfare. With the ocean on the brink of chaos, a young reef shark named Gray – exiled from the safety of his reef home – must venture deep into Open Water. There he will unlock the secrets of his destiny, and risk all to save his friends…