In Known Unknowns, Charles Saatchi provides fascinating insights into some of the world’s lesser-known but truly extraordinary historical events and social phenomena.

100 individual essays illustrated with 198 arresting photographs tackle subjects as varied as the tattoo habits of Russian criminals, the Vatican’s favourite Barbie, North Korean traffic jams, American gun legislation and the world’s richest animal.

Behind each poignant, startling and often disconcerting image lies a treasure trove of hidden histories.

Drawing on a career that has seen him produce and collect some of the most iconic images of modern times, Charles Saatchi presents his own unique perspective on contemporary culture.