The Summer of the Shark by Alexander Carr

If you liked Jaws, you'll love this book.

Nick Martin, internationally renowned wildlife presenter and shark expert, is called in to investigate a Great White shark attack in Scottish waters. Along with his new assistant, Emma Warren, they track the shark's movements southwards to the north Cornwall coast during the peak tourist season.
As sightings and attacks mount up, the government struggles to keep beaches safe, tensions rise, and the situation becomes increasingly perilous. Nick and Emma must risk everything to save lives, and to save the shark. But they are fast running out of options – and out of time…