Fics like Curiouser and Curiouser.

Harry is more then just a wizard; he's a genius and a tinkerer. So what happens when he meets another genius the beginning of his third year? One that deduces Harry's treatment at the Dursleys in less then a minute? The answer; Quite a lot, apparently... And London, magical and non-magical will never be the same. Mentor!Sherlock/Protege!Harry

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