The book contains ~90 GPS coordinates of important to know places, ~40 website links, covering all the important campsites, hotels, viewpoints, trails, key sightseeing, it has a detailed trekking map, and ~14 photographs I made in March-April 2017. The book first describes how to get in/out the park, all park’s updated rules and prices, then how to design your trekking route and how to book all accommodation in the park and nearby. In addition to popular “W” and “O” trekking circuits in the park, I give information about another 6 less-known, secret “off-the-bitten-pass” trails. I also give all the details for wild and paid camping, hotels, hostels, domes, cabins, food stores, roads conditions, travel scenarios, public buses, prices for touristic services, paid tours, wildlife safaris, fishing, kayaking, horseback riding. At the end of the guide, I give detailed information what kind of wild animals and where you can meet in the park (puma, condors, huemul, guanaco, fox) and their behavior. I also describe where you can find fossils from Jurassic Era of ichthyosaur, of a large prehistoric marine dolphin-like predator, or to see ancient cave paintings of indigenous tribes lived here 3000-8000 years ago. The book can be equally useful for "budget" adventure seekers, solo/group travelers, "fast & easy" with a rented car/campers or travel agency users as well as for paid wildlife and travel photographers on a mission.