Here are some recommendations based on different genres and interests:
Adventure & Fantasy:
* The Hobbit by J.R.R. Tolkien: A classic tale of a hobbit's journey with dwarves to reclaim their treasure.
* Percy Jackson & The Olympians series by Rick Riordan: A modern-day twist on Greek mythology, perfect for fans of action and adventure.
* The Chronicles of Narnia by C.S. Lewis: A magical world where children fight against evil and find friendship.
* A Wrinkle in Time by Madeleine L'Engle: A mind-bending adventure across time and space with three siblings.
* The Ranger's Apprentice series by John Flanagan: A young apprentice learns to become a ranger and faces dangerous challenges.
* The Kane Chronicles by Rick Riordan: Egyptian mythology meets action and humor in this thrilling series.
* The Book Thief by Markus Zusak: A powerful story about a young girl in Nazi Germany, told from Death's perspective.
Mystery & Thriller:
* The Hardy Boys series by Franklin W. Dixon: Classic mystery stories with adventurous teenage detectives.
* Nancy Drew series by Carolyn Keene: Another iconic series featuring a resourceful young detective solving mysteries.
* The Goosebumps series by R.L. Stine: Spooky and suspenseful stories for those who enjoy a good scare.
* The Westing Game by Ellen Raskin: A complex mystery with an intriguing puzzle to solve.
* The Mysterious Benedict Society by Trenton Lee Stewart: A group of gifted children solve riddles and uncover secrets.
Contemporary & Realistic Fiction:
* The Hate U Give by Angie Thomas: A powerful story about a teenage girl who witnesses a police shooting and becomes an activist for justice.
* The Absolutely True Diary of a Part-Time Indian by Sherman Alexie: A humorous and poignant coming-of-age story about a Native American teenager.
* Wonder by R.J. Palacio: A heartwarming story about a boy with facial differences who navigates the challenges of school and friendships.
* Stargirl by Jerry Spinelli: A unique and heartwarming story about a girl who challenges the norms of her school.
* Eleanor & Park by Rainbow Rowell: A sweet and relatable story about two teenagers who find love in the unlikeliest of places.
* The Girl Who Drank the Moon by Kelly Barnhill: A magical and heartwarming story about a young girl who is raised by a witch.
Graphic Novels:
* The Unbeatable Squirrel Girl by Ryan North: A hilarious and empowering story about a superhero who can talk to squirrels.
* The Adventures of Tintin by Hergé: Classic comic books with exciting adventures and stunning illustrations.
* Maus by Art Spiegelman: A powerful graphic novel about the author's parents' experiences in the Holocaust.
* Smile by Raina Telgemeier: A heartwarming and honest story about a teenage girl's experiences with braces and a broken tooth.
* Anya's Ghost by Vera Brosgol: A haunting and beautifully illustrated story about a young girl who befriends a ghost.
This list is just a starting point. There are countless other great books for 12-year-olds out there. It's important to consider their individual interests and reading levels to find books that will engage and inspire them.