Harry Potter encounters an agent from a secret organisation, with strong mental powers,who eventually becomes his ally, and helps him in about everyting destroying horcruxes,for example ,especially in humiliating Malfoy and Get rid of some nasty teachers

Crossover between Asimov's Robot Novels and the HP Books Harry Potter's been the victim of one of Voldemort's plots. Elijah Baley gets called in to figure out what's going on. PostHBP, ignores TDH.