Measuring 135 x 187 millimeters, this book fits easily into a jacket pocket. Atypical for an exhibition catalogue. The format, the material, and the simple and inexpensive production in black and white print are intended to invite readers to take a relaxed approach to the book. The book can be read on the go to trace the Humboldt brothers' love of traveling. In terms of design, the layout refers to the systematic thinking and work of the Humboldt brothers. The tabular structures and the lavish use of lines in the original publications are cheerfully transferred to the present day.