We have the testimony of Harry, but witnesses can be notoriously unreliable, especially when they have only part of the story. This is a biography of Severus Snape from his birth until his death. It is canon-compatible, and it is Snape's point of view.

Boromir awakens from his death and finds himself in an unexpected situation. Basically book universe with some AU bits, but inspired by Sean Bean. Complete, after nine years as a work-in-progress.