Book excerpt: 'This is British wildlife off the coast of Wales shot in 4k, and it will totally blow you out of the water.' Dale Templar'I was amazed by the range of diversity in the Celtic Deep around Wales. I'm really proud that we did bring that sense of place to the series, showcasing the remarkable animals that live here.' Sally WealeA unique environment created by the confluence of three oceanic and climatic zones, the Welsh coast and its waters teem with life and diversity, documented here as never before. From seals and seabirds gathered along this celebrated coastline to the species to be found in the depths of the Celtic Sea, along with the behind-the-scenes challenges and triumphs of this landmark TV series, delve with the team into the wildlife wonders waiting to be discovered.