There are 1.3 million great whales left in the Earth's oceans today.

Climate activist Abi and her AI computer Moonlight are on a mission to protect the planet.

When they uncover whale song recordings made by Abi's great-grandfather, a whale hunter, Moonlight discovers a pattern...

...the songs are a map to a future that could rescue the whales and rescue the world.

'A hard-hitting, beautifully written call to arms' Guardian

* Daily Mail Best Book of 2022 *
* Big Issue Kids' Best Book of 2022 *