Harry potter half blood prince

harry is starting his sixth yaer at hogwarts school of wicthcraft and wizardry. his year starts badly as he almost misses the train and breaks his nose. however his bond with his friends get stronger. he falls in love with ginny weasly ron's sister. at the end of the year professer dumbledoor gets killed and he is left to put the peices of the puzzle that dumbledoor has given him together. he won't return to hogwarts next year he says and will go on the mission dumbledoor has set him.