Some good books for 8-year-old girls are "Charlotte's Web" by E. B. White, "Matilda" by Roald Dahl and "The Arrival" by Shaun Tan. Some other books include "Charlie and the Chocolate Factory" by Roald Dahl and "How to Train Your Dragon" by Cressida Cowell.
"Charlotte's Web" tells the story of Charlotte the spider, who spins miraculous webs over the pig den of her friend Wilbur the pig. Wilbur finds another guardian in Fern, a little girl who joins the campaign to save his life. "Matilda" is about a little girl who defies her unpleasant, neglectful parents by teaching herself to read and taking herself to school. With the help of her teacher, Matilda uses some unusual abilities to find success despite her parents and a terrible headmistress. "The Arrival" tells the story of an immigrant man as he tries to make his way through an unfamiliar place to find a new home.
"Charlie and the Chocolate Factory" follows the journey of Charlie Bucket as he wins a chance to tour the infamous Willy Wonka's chocolate factory. Every child on the tour has to fight one temptation or another to make it to the end of the tour. "How to Train Your Dragon" is the humorous story of Hiccup, the son of a Viking leader, as he tries to catch and tame a dragon.