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"Thanks for the book, Harry! I've been wanting that New Theory of Numerology for ages!"
Harry Potter's Christmas present to Hermione Granger[src]

New Theory of Numerology, by Lukas Karuzos,[1] is a book that seems to be about Arithmancy, but is not a required text for the subject at Hogwarts School of Witchcraft and Wizardry.

History

Harry Potter gave a copy to Hermione Granger for Christmas in 1995.

Appearances

Notes and references

Arithmancy
Professors: Septima Vector
Known Arithmancers: Bridget Wenlock
Textbooks: Numerology and Grammatica · New Theory of Numerology
Arithmancy at Hogwarts: Arithmancy (class) · Classroom 7A · Advanced Arithmancy Studies
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