Von Daniken also points to the book of Enoch is his writings, as well as many other things. Look at the stories he found concerning former army officers turned explorers in India in the 19th century. India is one of the best sources for ancient descriptions that didn't make any sense until the modern war of 1914. The Mahabharata describes flying chariots, missiles, gas in warfare, and umbrella clouds.
The Hindi version can be a little on the heavy side to western eyes, Von Danikens books give the abridged version in the same way as he does the book of Enoch