"On the Threshold of the Lion" is a book written by the Portuguese writer Antonio Maria José de Melu Cesar y Menezes, Count of Sabugosa. In this book, the author shares his own observations and thoughts about nature and the animal world. He elevates the stories of lions and their lives in the wild, revealing to readers the striking beauty and mystery of these mighty predators. The book "On the Threshold of the Lion" is an exciting journey into the world of wild nature, which reveals before us all the greatness and immensity of natural landscapes and the creatures that inhabit them.