It all started with a letter from home and family. Except, Harry doesn't really have either, does he? He's about to get them.

Blood magic was supposed to keep Harry safe, but his relatives are expendable. Blood magic was supposed to keep Harry looking like his adoptive father, but it's wearing off. Blood is a bond, but so is the memory of hate -- or love.

The Best Defense and its sequels are an epic Harry Potter/Yu Yu Hakusho crossover, AU for 5th-7th years in the HP universe.

Petunia married a professor, and Harry grew up reading science and science fiction. Then came the Hogwarts letter, introducing strange new opportunities to exploit. And new friends, like Hermione, and Professor McGonagall, and Professor Quirrell.

Petunia married a professor, and Harry grew up reading science and science fiction. Then came the Hogwarts letter, introducing strange new opportunities to exploit. And new friends, like Hermione, and Professor McGonagall, and Professor Quirrell.

Once upon a time, Harry Potter hid for two hours from Dudley in a chemistry classroom, while a nice graduate student explained about the scientific method and interesting facts about acids. A pebble thrown into the water causes ripples. Contains, in no particular order: magic candymaking, Harry falling in love with a house, evil kitten Draco Malfoy, and Hermione attempting to apply logic to the wizarding world.