Heir to Atlantis Series

I saw it in a memory. I know how crazy that sounds. There were ten kingdoms of Atlantis, as Plato taught us, each ruled by one of the sons of the legendary Poseidon. I know where they all are. We are not the first advanced civilization. We aren't even the second. Others existed, and they left behind clues to help their descendants. To help us. I found those clues, including a device used by the ancients that allows me to relive their memories.

LIDAR scans of the area beneath the Great Pyramids have revealed something astonishing. An entire city lies beneath the sands, hidden for countless millennia, remembered only by the ancient priests of the early dynastic Egyptians. Thoth left behind the Emerald Tablets to explain what lies within the Halls of Amenti, a place that transcends life and death. There he met 32 immortal sages, and became the 33rd so that he could pass the knowledge onto the Egyptians.

I've found the Fortress of Atlas, and been to the legendary Halls of Amenti. I know Atlantis was real, but the city was destroyed by a massive tidal wave. Except now I know part of the city survived. Beneath Atlantis lay the vast cavern known as Abzu, from ancient Sumerian mythology.