Ocean is gripping. It dives into some key habitats, meets intriguing characters, explores the challenges they face and seeks solutions. In The Deep chapter, it’s the endearing cock-eyed squid and the rough-eyed rockfish which lives over 200 years at 800m deep. Sometimes the wildlife is so fantastical that the images on the page feel like works of the imagination. Deep sea life is mysterious, intricate, rich and fragile – but it is being heavily fished and mining companies seek to exploit its seabed. The author urges countries to apply the precautionary principle by saying no to deep-sea mining before the industry has really got going; before it’s too late.