The Penis Atlas is a book by four Norvegian sexologists, a photographer and a designer, using photographs of 100 men in order to inform, demystify and correct many existing misunderstandings about the male sex organ.

The publishers said the authors try to give a complete and correct presentation of the penis, in different ways and from differing viewpoints.

The book also includes a unique photo project, where 100 men are photographed in relaxed and erect state, and data on the size, variation according to weight and height, shape, color and more is catalogued and discussed.

Link.