Pedagogy and Other Defenses against the Dark Arts: Professor Severus Snape and Harry Potter - The Philosophical Salon
8 times the Half-Blood Prince reveals the real Snape | Wizarding World
Snape as the Dark Knight : r/harrypotter
Why do some people claim that Severus was already deep into the dark arts in fifth year when Lily only accused him of having a friend who tries to do dark magic