The "Gruenholtz: The Fine Art of Erections" is a hardcover picture book authored by Kenneth Gruenholtz and published by Salzgeber Buchverlage GmbH. The book features erotic photography of the male body and explores the art and culture of erections. It has 176 pages and measures 10 inches in length, 13 inches in height, and 1 inch in width. The book is written in English and was published in 2023 in Germany. The book falls under the genres of Adult & Erotic, Photography, Art & Culture, and LGBT.