well, technically, no one's read all of them, because we're still eagerly awaiting the last book, the death hallows! but i have read all of the published books.
sorcerer's stone: harry potter, an eleven year-old orphan living with his horrible aunt and uncle and his spoiled cousin dudley, soon discovers that he is a wizard when he receives mysterious letters from hogwarts school of witchcraft and wizardry. at school, he befriends goofy ron weasley and brainiac hermione granger, discovers quidditch, and learns to do magic. but there are mysterious happenings at the school concerning the dark wizard voldemort who murdered harry's parents. voldemort's body was destroyed when his killing curse intended for harry backfired, and now his spirit is desperately trying to create a new body and become immortal at the same time. can harry find the sorcerer's stone before voldemort?
the chamber of secrets: harry returns for his second year at hogwarts, and things already begin to get turned upside down. a new defense against the dark arts teacher, the self-loving gilderoy lockhart, tried to take harry under his wing to "help" him cope with his sudden fame. but while practicing at the new dueling club, harry discovers that he is a parseltongue. that is, a wizard who can talk to snakes. even more disconcerting is the deadly voice that only harry can hear, and a mysterious creature that petrifies students and is led by none other than the heir of slytherin himself. the trouble is, everyone thinks that it's harry who's terrifying the school. with the help of a mysterious diary from the even more mysterious tom riddle, harry tries to unlock the key to the chamber of secrets. but who is tom riddle, and why does he want to help harry?
the prisoner of azkaban: the terrible murderer sirius black has escaped from the wizard prison of azkaban, and the word is that he's after harry. at school for his thrid year, harry, ron, and hermione encounter dementors, terrifying creatures who suck the happiness out of you. with black on the loose, the ministry of magic tries to protect the student, and especially harry, from the deranged murderer, but secrets about who the man really is are revealed. a new teacher, professor lupin, guides harry through a tough year, but he has a dark secret of his own. the truth about the circumstances of harry's parents' deaths are revealed, so the question is, who really betrayed lily and james potter to the dark lord?
the goblet of fire: the next summer before school, harry visits the weasleys who take him to the quidditch world cup final. it's meant to be a few days of fun and excitement, but startling events at the world cup cut the enjoyment short. many of voldemort's followers, called death eaters, show up and terrorize the camps. as they return to school for fourth year, the trio discover that the prodigious triwizard cup will be held at hogwarts in competion with two foreign schools. the three champions, a world cup quidditch player victor krum, a beautiful french girl fleur delacour, and quick-witted cedric diggory from hogwarts, are chosen to compete for their schools. but they are unexpectedly joined by harry, whose name is illegally entered. the reason is clear: someone wants harry dead. the obvious candidate: voldemort. but there could be help from within. alastor "mad-eye" moody, helps harry to overcome some difficult challenges. so, who is the death eater concealed in the castle that desperately wants harry dead?
the order of the phoenix: harry is rescued during the summer from his relatives by the order of the phoenix, a group that fights against voldemort. he is taken to their headquarters before he begins his fifth year at hogwarts. when he returns to school, a new teacher, dolores umbridge, makes life difficult for everyone. everyone believes that harry and dumbledore are lying about voldemort's return, and she makes harry pay dearly for defying her in class. but other things happen too. harry has to take occlumency lessons with greasy potions master professor snape in order to guard his mind from intruders. if that wasn't bad enough, harry fears that someone dear to him will be discovered and attacked. he starts a secret group in order to learn defensive spells against voldemort since umbridge has forbidden them to practice defensive magic. harry later leaves the school with a group of friends to go to the ministry to save someone, but they find themselves in a trap that they are unlikely to escape. their battle ends in an unexpected death that leaves harry devastated. what does voldemort have in store for harry and his unsuspecting friends?
the half-blood prince: still mourning from his horrible loss, harry returns to school for a sixth time. surprisingly, professor horace slughorn is the new potions master, but snape got defense against the dark arts, the job he has always wanted. harry finds an old potions book with hand written notes in the margines that greatly help harry in his potion-making. however, hermione discourages him from using it because they don't know anything about the previous owner other than the fact that he called himself "the half-blood prince". who is this mysterious prince? several near-death experiences occur at school with several different people, but all murder attempts are intended for one person, but who is it? and who is behind these devious plots?
the deathly hallows: it's going to be the best book in the series, but it's not coming out 'til july! grrrrrrrrrr....