Best Books for Ages 9-12 in 2025
Recommended middle-grade fiction for confident readers, ranked by real Amazon UK sales during 2025.
“The Extremely Embarrassing Life of Lottie Brooks” by Katie Kirby was the best-selling book for ages 9-12 in 2025, ahead of “Lottie Brooks's Totally Disastrous School-Trip (Lottie Bro…” and “Lottie Brooks’s Essential Guide to Life”. 98 of the 100 books below hold an average rating of 4.5 stars or better, led by “The Catastrophic Friendship Fails of Lottie Brooks” on 4.8 stars from 4,074 reviews.
Ranked by how well each book actually sold on Amazon UK across 2025 — not by our opinion, and not by how they sell today.
FAQs
What were the best books for ages 9-12 in 2025?
The best-selling book for ages 9-12 in 2025 was "The Extremely Embarrassing Life of Lottie Brooks: The first hilarious diary in the bestselling series: 1", measured on real Amazon UK sales rank across 2025. See the full top 100 below.
How is this list ranked?
By real Amazon UK sales rank averaged across 2025 specifically, so it reflects what actually sold to this age group during that year rather than what sells today.