The Riddle of the Universe at the close of the nineteenth century
2015
Art Forms in Nature
2012
The History of Creation, Vol. 1 (of 2) / Or the Development of the Earth and its Inhabitants by the Action of Natural Causes
2018
The History of Creation, Vol. 2 (of 2) / Or the Development of the Earth and its Inhabitants by the Action of Natural Causes
2018
The History of Creation
2020
Natur und Mensch
2022