"All you will ever need to know about what makes spells work."
— Advert at Flourish and Blotts[src]

Magical Theory written by Adalbert Waffling was a required textbook for first year students at Hogwarts.[1] It was available at the Hogwarts Library, or for sale at Flourish and Blotts bookstore for two Galleons.[2]

Known contents

In a chapter speaking of the first fundamental law of magic:

Tamper with the deepest mysteries ⁠— the source of life, the essence of self - only if prepared for consequences of the most extreme and dangerous kind.[2]


During the 1991-1992 school year, a Gryffindor student lost their copy of Magical Theory on the Hogwarts grounds and posted a notice requesting its return on the Gryffindor pasteboard. Harry Potter found it near Hagrid's Hut and returned it to the student, receiving a Chocolate Frog Card depicting Mopsus for his trouble.[3]

Hermione Granger owned it, usually storing it in her school trunk.[2]

Behind the scenes


Notes and references

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