Umm... 1) Hogwarts School of Witchcraft and Wizardry. 2) "Are you a witch or not?" - Ron Weasley to Hermione Granger.
I dare say that witchraft is mentioned quite often throughout the book(s), however I don't see how it could be considered a manual. There's only the vaguest reference to "swish and flick" and the dangers of misenunciation but nothing that would be remotely close to "instructional".
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Yeah i forgot about that when i first posted it sorry.