Capstone

Capstone is the Minneapolis-based K-5 educational publisher behind classroom nonfiction, children's books, and the curriculum platform PebbleGo. The company says it has spent more than 30 years building print and digital products for school libraries, classrooms, and at-home reading, with a catalog designed to make literacy feel accessible instead of dutiful.

That range matters because Capstone does not operate like a single-series house. It publishes broad elementary reading programs, licenses highly browsable children's nonfiction, and keeps launching new lines built around how kids actually consume information now. Its 2025 launch of Brain Candy Books pushed that strategy into sharper focus, packaging stats, quizzes, photos, and short-form nonfiction for readers who are more used to feeds than chapter books.

The brand has already crossed into mainstream pop-culture coverage through the 2026 Jungkook title in Brain Candy's Your Favorite Stars branch, a move that pulls a member of BTS into an American classroom-oriented series. That combination of literacy utility and timely subject matter is where Capstone looks strongest right now.