

Arcturus: (grinning) Do your worst.
In a World… where Tom Riddle launched a political party instead of a war, there is widespread and legally enforced discrimination against non-purebloods. Harriet Potter grew up with both of her parents and all of the Marauders alive and well, but as a half-blood, she isn't allowed to attend Hogwarts (and worse restrictions are coming).
She isn't going to let that stop her from getting a world-class Potions education under Professor Snape, though, and so she plots with her pure-blooded cousin Arcturus Black to swap identities during the school year. Too bad that they didn't realise how outstanding she could really be, and how much attention "Rigel Black" would attract from those who would use or control "him" — especially Tom Riddle himself.
The Rigel Black Chronicles is a series of Harry Potter fanfiction written by murkybluematter aka "Violet Matter", drawing on elements of the Song of the Lioness:
- Year One: The Pureblood Pretense
- Year Two: The Serpentine Subterfuge
- Year Three: The Ambiguous Artifice
- Year Four: The Futile Facade
- Year Five: The Malignant Masquerade
Book five is in progress as of August 2022, with the next update expected around June 2023.
The series is also being cross-posted to Archive of Our Own with minor revisions, here.