Lily Potter receives a warning not to let Voldemort find out about her child; Voldemort goes to kill Neville Longbottom on Halloween, but he did not realise how unstable his soul was, which lead to a complication that weighs on his mind even as he succeeds in taking over Wizarding Britain. Follow the highly intelligent Harry as he makes his way through a Voldemort-ruled Hogwarts.

Petunia married a biochemist, and Harry grew up reading science and science fiction. Then came the Hogwarts letter, and a world of intriguing new possibilities to exploit. And new friends, like Hermione Granger, and Professor McGonagall, and Professor Quirrell... COMPLETE.

AU. Time Travel. Snape goes back in time, holding the knowledge of what is to come if he fails. No longer holding a grudge, he seeks to shape Harry into the greatest wizard of all time, starting on the day Hagrid took Harry to Diagon Alley. No Horcruxes.

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.

Harry has had enough of seeing his reputation shredded in the Daily Prophet and decides to do something about it. Only he decides to embrace his Slytherin side to rectify matters.