The Time Quintet, Madeleine L’Engle
L’Engle’s classic sci-fi series follows the adventures of math genius Meg Murry, her telepathic little brother Charles Wallace Murry, and their friend Calvin O’Keefe (and later, other members of their family) as they endeavor to save the world from various baddies — the Echthroi, the forces of Unnaming, nuclear war, and of course, IT. Turns out, quantum physics, megaparsecs and complicated math equations are important, but not as important as the power of love.

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