Story Title: Midnight Guardian
Author Name: ksomm814
Story Url: Story Link 1
Alternate Url: Story Link 2
Content Rating: Teen
Story Summary: AU Third Year. What if a certain phone call pushed Uncle Vernon too far, changing everything? The truth will be revealed but which version will Harry believe? The past will be revealed along with the introduction of old acquaintances.
This multi-part series began with PoA. This is an interesting part-canon/part-AU series as it follows basic canon, having change only a few details at the start of the first fic, which accounts for the AU aspect. The first fic starts out as another Abused Harry story. The difference is that Padfoot saw what was happening that summer before 3rd year and rescued Harry. The first story, Midnight Guardian, covers Book 3. The next fic, Trials of a Champion, covers the Triwizard Tournament/Book 4. Burden of a Destiny covers Book 5. Power of Hogwarts, covers Book 6. And the final, completed fic, Rise of the Protector is an AU Book 7.
My favorites in the series are the earlier fics, before it gets to AU. Several versions of the “Sirius-raises-Harry” story exist, but in spite of some typos, this is one of the best, as well as the longest and most exhaustive exploration into that idea that I’ve seen.