If you love Harry Potter and the Philosopher Stone, you will love Harry Potter and the Chamber of Secret. If you finish the Philosopher Stone book, you definitely need to read the Chamber of Secret. 
 The sequel was amazing. So there he was, Harry Potter, after defeated Voldemort and saved the Philosopher's Stone, sitting in his own bedroom in the summer. Harry felt worse and worse each day: He had to stayed with the Dursleys. He wondered why he couldn't got any letters from his friend at school : Hermione, Ron, Hagrid,.... He met an elf named Dobby, who warned him not to return back to Hogwarts 'cause something terrible will happening there. 
 At night, Ron Weasley with Fred and George decided to rescue Harry on a flying car. Harry was really excite when he saw three of them appeared at his bedroom window. Four of them drove back to Ron's house. 
 On September 1, Harry and Ron was late for school and ran quickly to the gate to the train of Hogwarts but the gate was close. Ron had an idea - driving flying car. Things not go quite as plan when the car accidentally bumped on the Whomping Willow. The car drove away, let Harry and Ron on the ground with their suitcases and pets. Harry and Ron almost get kick out of school, and Ron's parents were really disappoint and angry when they knew that. 
 But things start to go bad when a new DADA teacher arrived at school: professor Gildery Lockhart who was really narcissistic. 
 But the worst thing is: there were messages on the walls said that the mythical Chamber of Secrets once again open. The Chamber of Secret was used to be a room made by Salazar Slytherin - a pure blood and one of the most powerful wizard. There was a horrible and evil monster lurked in the chamber. 
 Students whose had parents are both Muggles will be kill, which mean Hermione was also in the list. 
 Some students and teachers were petrified. Harry also learned that he is actually had the power of speaking to snake - Parseltounge - a dark art so students suspected that he might be the heir of Slytherin. But Hermione, Ron and Harry believed that he is not. Three of them suspected Draco Malfoy. So Harry, Hermione, and Ron started to make the polyjuice potion - which will help them took form of another person in a while. 
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 Harry and Ron disguised as Crabbe and Goyle - Malfoy's sidekicks, while Hermione accidentally turned into a cat. So Hermione had to go the Hospital Wing. Harry and Ron asked Malfoy about the Chamber of Secret and they knew that Malfoy wasn't the one who opened it. 
 Harry discovered a diary in the girl bathroom - a diary of Tom Riddle. The paper of the book was completely blank, which was weird. Harry wrote in and the letters disappeared, then another new letters appeared from another one. It was Tom Riddle wrote back for him. Tom Riddle used magic so Harry found himself returned back to Hogwarts 50 years after, when the Chamber of Secret was opened. The one who opened it was Hagrid - according to the headmaster of the school. But after that, Harry and Ron knew that Hagrid was innocent. 
 Things were worse when they heard a news : Hermione Granger was petrified. 
 Harry and Ron found a note in Hermione's hand: 
 "Of the many fearsome beasts and monsters that roam our land, there is none more curious or more deadly than the Basilisk, known also as the King of Serpents.Its methods of killing are most wondrous, for aside from its deadly and venomous fangs, the Basilisk has a murderous stare, and all who are fixed with the beam of its eye shall suffer instant death. 
 Can Harry and Ron kill the serpent? 
 Who is the heir of Slytherin? 
 Who has opened the chamber of secret? 
 The answer is easy : just read the book :) 
 Harry with Draco. 
 Harry Potter and the Chamber of Secret. 
 Hope you enjoy the book!