J.K. Rowling wrote a series of books featuring a young wizard named Harry Potter. The seven book series chronicles one year in Harry's life as he attends Hogwarts School of Witchcraft and Wizardry. An orphan who is treated extremely badly by the relative that took him in becomes the most important and famous wizard.
The book series begins with Harry Potter and the Philosopher's Stone or Sorcerer's Stone in some countries. The book starts around Harry's eleventh birthday. This is when Harry finds out that he is a wizard and starts his first year at the Hogwarts School. The wizard world is parallel to the real word and comprises of hidden streets, ancient pubs, distant country manors, and secluded castles. Everything is kept hidden from non-wizards called muggles. Harry meets two new friends that stay close to him throughout the series. Their names are Ron Weasley and Hermione Granger. The three get into a lot of adventures together throughout the series. The book ends with Harry's second encounter with Lord Voldemort with a battle over the Philosopher's Stone.
Harry's second year at Hogwarts is chronicled in Harry Potter and the Chamber of Secrets. Harry, Hermione, and Ron strive to solve a fifty year old mystery tied to an evil event in the schools past. Ron's younger sister, Ginny, finds Voldemort's notebook and accidently opens the Chamber of Secrets, releasing a dangerous monster as well. Ample Hogwarts history is revealed in the second book including Lord Voldemort detest for wizards that have muggle parents, like Hermione. Harry battles to save Ginny's life.
Harry Potter and the Prisoner of Azkaban, the third novel, is about Harry's struggle against an escaped murderer Sirius Black. Harry has to face dark creatures that have the power to take a human soul, called dementors. He works with Professor Lupin, a defense against the dark arts teacher, to learn more and more about the powers he possesses.
The fourth book, Harry Potter and the Goblet of Fire is about the tri wizard tournament. This is a dangerous contest where the best wizards compete from different schools. The stakes are so high that lives are at stake. Lord Voldemort uses the competition to get Harry all by himself.
The series continues, with Harry Potter and the Order of the Phoenix. Lord Voldemort has gained a lot of strength and starts to gain followers again. In response, Dumbledore re-activates a secret society called the Order of the Phoenix to protect Voldemort's targets. Harry struggles to convince the Ministry of Magic that Voldemort has returned. A new head minister is assigned to Hogwarts and Harry and his friends battle Voldemort's followers, the Death Eaters.
Harry Potter and the Half-Blood Prince is about Harry's sixth year at Hogwarts. Harry comes across a special book that used to belong to the half-blood prince. The book has special notes in the margin that gives Harry an advantage over the other students. Harry finds a love interest in Ginny. The book ends in a great tragedy that will change the lives of everyone forever.
The last book begins with Voldemort reaching his full power and taking over the Ministry of Magic. Harry, Hermione, and Ron drop out of Hogwarts so that they can find the remaining horcruxes, which are inanimate objects that trap pieces of your soul in them. If they are still intact, the person cannot be destroyed. They isolate themselves from their friends and family for protection. The book ends in the great Battle of Hogwarts.