During one of Professor Slughorn's Slug Club parties, Snape was told of Harry's sudden improvement in the art of potion-making. Snape then suspected that his old textbook may have fallen into Harry's hands. When Harry used Sectumsempra on Draco, Snape
was able to confirm his suspicions, but was unable to get his hands on the book, as Harry had stashed the book inside the Room of Requirement and used Ron's book as a decoy. As a result, Snape (correctly) accused Harry of being a liar and cheater, and
punished him with a multitude of detentions for injuring Malfoy and cheating in potions. Despite knowing Harry's source for the curse, Snape chose not to outright turn Harry in for a harsher punishment, as he feared it would connect himself to being the
inventor of the curse. Using this curse greatly shocked Harry, as he did not expect the Prince would have added something so vicious into the notes, and even reprimanded the Prince within his own mind of doing so; nevertheless, he intended on retrieving
the book if he had a chance to. As a result of hiding the book from Snape, Harry's potions grade declined sharply from thereon, though Slughorn attributed this to Harry's newfound love with Ginny Weasley.[6]
Advanced Potion-Making was a book written by Libatius Borage. As the title implied, this book contained advanced recipes and various other topics related to potions. This textbook had been used for many years in the education of young witches and wizards.
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Advanced Potion Making By Libatius Borage pdf
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This book was released around 1946 or earlier. It was used by students at Hogwarts School of Witchcraft and Wizardry, in their final two years of study. This is a N.E.W.T.-level textbook used in Potions class; students who achieved an 'Outstanding' or an
'Exceeds Expectation' on their Ordinary Wizarding Level, advance to N.E.W.T. where they get the chance to study advanced potion-making and by extension this book.[1]
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