The Alex Cave Series, Books 1-3

Oil supplies around the world begin to mysteriously vanish, leading to societal chaos, as a geophysicist investigates unexplained occurrences at sea and on land. The discovery of strange crystals and the theft of an alien artifact escalate the crisis, threatening to trigger global catastrophe. Tensions rise as the story unfolds at clandestine research facilities, revealing a gripping and unpredictable conflict.