As someone who reads a lot of nature and pop science writing, especially on the topic of rewilding, I wondered going into this book whether enough of the material would be new to me. I'm very pleased to say: YES. Preston's style of writing somewhat straddles the "poetic nature writing" camp and the "harder-edged pop science writing" camp. It's a good balance. Hs descriptions of the places he visits are brief but vivid enough. There are some lines of soaring beauty. He sticks to the template of a researcher going around and interviewing various scientists and other experts, but his chosen case studies are fascinating enough that the narrative remains compelling throughout. I relished the amount of detail the author gave to each species he focused on. Some pop science books whiz through a huge variety of species, but I tend to find them less satisfying. In 'Tenacious Beasts', the animals are familiar ones - American bison, American wolves, whales, etc. - but I learned a great deal of new things about how exactly they have managed to return to old haunts. I suspect the fact that Preston is British, albeit a Brit who has spent some of his life living in the USA, also gives him the advantage of a fresh perspective on conservation and rewilding in that country. On the other hand, bear in mind that the book is very American-centric, though there are some pleasant forays in the UK and Italy. One final piece of praise for me is the number of female scientists in the book - I'm still grumpy from a recent nature/conservation book in which every person featured was male. HIGHLY recommended to anyone with an interest in rewilding and conservation, and a need for hope. The one real downside for me is that cover - I had to carefully read the blurb to make sure I wasn't about to dive into a children's book!