Harry Potter and the Chamber of Secrets: Harry Potter, Book 2

Kids are in peril often, but at the hand of fantasy creatures most of the time: giant spiders and an angry tree attack, and a basilisk (giant serpent) has Medusa-like abilities, nearly killing characters and putting them in a rigid, comatose state -- it also chases Harry. Harry falls from his broom and breaks his arm, then bones in his arm are magically and mistakenly removed. A house elf punishes himself by hitting his head repeatedly. In a practice wizards' duel, a (small) snake threatens a student. A spell backfires and Ron coughs up slugs. Two main characters almost die in the book's climax. Two fathers have a fistfight. A party for ghosts makes light of many ghosts who had been beheaded and can take off their heads for sport. Mentions of Harry's parents dying in a magical attack when he was a baby. Harry is routinely treated poorly and threatened by his aunt and uncle.

Hermione is called a "mudblood" by Draco, an offensive term in the Potter world meaning "dirty blood," for being part wizard and part muggle.

A mention that Percy Weasley's younger sister Ginny catches him kissing his girlfriend.

There's a little diversity at Hogwarts. Lee Jordan is described as having dreadlocks, and the Indian Patil twins are in Gryffindor house. Some diverse family structures are described: Harry lives with his aunt and uncle and Neville with his grandmother. Harry and Ron bond over growing up with second-hand clothes and wishing they had more money. Ron's insecurity over being from a poorer family comes up a lot. Women have prominent roles at Hogwarts: Professor McGonagall and Professor Sprout are both heads of houses. There are two girls on the Gryffindor quidditch team. There's only one large-size character who isn't a bad guy, and that's Hagrid. Lots of negative language around the size of Dudley and his father and Malfoy's Slytherin friends Crabbe and Goyle.