Desmarquet claims the pyramid was a "cosmic tool" and a communication device, rather than a tomb.
Below is an overview of the most intriguing claims and themes explored in the book: The Journey to Thiaoouba Thiaoouba Prophecy
The journey occurred via "transubstantiation," a process of leaving spacetime and re-entering it elsewhere in the galaxy. Alternative History of Earth Desmarquet claims the pyramid was a "cosmic tool"