Robert Frank is best known for his photography book, The Americans, published in 1958. The book is a collection of 83 black-and-white photographs that Frank took during a road trip across the United States in 1955 and 1956. The photographs depict the everyday life of Americans from all walks of life, and they offer a candid and often critical look at American culture.
The book was groundbreaking in its time, both in terms of its subject matter and its photography style. Frank's use of blurred and grainy images, as well as his unconventional compositions, challenged the conventions of traditional documentary photography. The book was also controversial, and it was initially rejected by several publishers before it was finally accepted by Grove Press.
Despite its initial controversy, The Americans has since been recognized as one of the most important photography books of the 20th century. It has been praised for its raw and honest portrayal of American life, and it has influenced countless photographers and artists.