Temperate rainforest may once have covered up to one-fifth of Britain, inspiring Celtic druids, Welsh wizards, Romantic poets, and Arthur Conan Doyle’s most loved creations. Though only fragments now remain, they are home to a dazzling variety of luminous life-forms.

In this awe-inspiring investigation, Guy Shrubsole travels through the Western Highlands and the Lake District, down to the rainforests of Wales, Devon, and Cornwall to map these spectacular lost worlds for the first time.

This is the extraordinary tale of one person’s quest to find Britain’s lost rainforests – and bring them back.