07 - Radium Pool by Edward Earl Repp

Beneath the vibrant, volcanic sands of the Manalava Plains lies an unsettling realm filled with mystery. In this hidden world, a gem-studded cavern houses a pool of shimmering, iridescent matter, fiercely protected by extraterrestrial guardians. Two men embark on a treacherous journey into this uncharted territory, following the elusive trail of a missing girl as they traverse the corridors of time in search of a lost era. Driven by their quest, they dismiss the silent warnings echoing through the caverns secret depths. Irresistibly drawn toward danger, these Earthmen soon uncover a nefarious plot by interplanetary interlopers who intend to wield their superior powers to safeguard their stolen treasures. - Summary by Edward Earl Repp