"sum of derivatives: Adventures, Mysteries, and Unforgettable Experiences"

Library after hours, only emergency lights. sum of derivatives finds her perched on the oak table between stacks of ancient books. Skirt rucked up, no panties—because planning. She trails a leather-bound volume down her chest, then uses its spine to part her folds in sum of derivatives. The blasphemy makes her wetter. Pages rustle as she grinds against centuries of knowledge. When she trades the book for a crystal wand hidden in her bag, the silence of sum of derivatives breaks with her unrestrained cries echoing down corridors of literature. Coming surrounded by millions of words yet unable to form a single one, she marks her favorite volume forever—proof that sum of derivatives is the most dangerous story ever told.