John Muir (1838–1914) was an influential Scottish-American naturalist, environmental philosopher, glaciologist, and advocate for the preservation of wilderness in the United States. His writings and activism helped to inspire the conservation movement and led to the establishment of several national parks. Muir's profound connection with nature and his literary expression of the experience invited others to see the spiritual and aesthetic value in preserving the natural environment. Best known for his eloquent books, essays, and letters, Muir's legacy is imprinted in works such as 'My First Summer in the Sierra' and 'The Mountains of California', both of which are included in the 'JOHN MUIR Ultimate Collection (Illustrated)'. This anthology extends across his literary career, encapsulating his vivid descriptions of the landscapes he so fiercely worked to protect and his philosophy that safeguarded such splendors for future generations. He was a co-founder of the Sierra Club, a prominent conservation organization, and played a crucial role in the creation of Yosemite National Park. Muir's contributions to environmentalism were not only foundational in the formation of national parks but also in fostering an enduring appreciation for the intrinsic value of nature.