Fingerprints of Gods is Graham Hancock's classics that was written back in the 90s. He runs an alternative archaeological evidences and attempted to prove a much higher civilization existed in thousands of years before us. He also described that many civilisations from different parts of the world shared highly similar myths and stories. It seems that they were told by the same group of people, or witnessed the same observations. This might lead to the origins of human beings, as well as our ancestors' interaction with higher intelligent beings. It's an amazing book to read even today, after 30 years of its issuance. Fyi that Hancock still runs his website even today.