Elena Houghlin is a scientist, engineer, and inventor of Calisto — a sustainable energy
source that will revolutionize the way people use power. But when the cutting edge
technology falls into the wrong hands, Elena turns to the Townsend Agency for help. Now, it’s up to the Angels —
Jane, Sabina, and the newly recruited Elena — to retrieve Calisto before it can be transformed into a weapon of mass destruction.
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