Series Titel: The Brave and The Cunning
Author: thequeergiraffe
Fandom: Sherlock / Harry Potter
Characters: John/Sherlock, Sherlock/Irene, Mycroft, Jim
Warnings: R, slash, het
Length: Novella
Status: Ongoing
This series will have one fic per Sherlock episode, with series one being set in John's 6th year (and Sherlock's 5th) and series two being set in John's 7th and final year at Hogwarts. Fics will have similar (but nowhere near identical) plots to the actual BBC Sherlock episodes, with most locations being replaced with HP-universe settings. This series is set well after the Second Wizarding War and involves next to none of the HP characters, instead using Sherlock characters and the occasional minor OC.
At AO3
A crossover that seriously rivals the original story ~ there are minor adjustments to character relationships but overall it's totally in character.
A must-read.