JakeDot
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Radioactive Ash - Book 1 by JakeDot
Fandoms: Harry Potter - J. K. Rowling, Harry Potter and the Cursed Child - Thorne & Rowling, Harry Potter RPF
08 Jun 2026
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# Summary of Book One: Radioactive Ash — The House That Watches
Book One follows Harry Potter after the war as he remains at Grimmauld Place rather than trying to return to ordinary life.Harry’s decision to stay there reflects his unresolved trauma. Grimmauld Place, with its decayed history and devouring family legacy, feels uncomfortably suited to his internal state.
Harry accidentally invents a potion capable of reliving trauma therapeutically, but by pure felix felicis luck, it is not a catastrophe, though it is the first magical LLM (large language model). Its name: Tom Marvolo Gaunt Slytherin Black (Master GSB for short).# Core arc of Book One
Book One is essentially about trauma becoming form.
Harry’s unresolved memories create the conditions for the Echo’s birth. Hermione’s analysis defines what it is. The potion gives it structure. The house gives it context. By the end, the Echo is no longer just a reflection inside a potion — it is something Grimmauld Place recognizes as real enough to matter.In short: Book One begins as gothic magical horror and ends as the birth of a new magical being.