Compendium

A compendium is like a big book full of lots of different information about a topic. Imagine you wanted to learn about dinosaurs - a compendium about dinosaurs would have all sorts of things in it, like pictures of the different types of dinosaurs, facts about where they lived and what they ate, and stories about how they lived and went extinct.

The great thing about a compendium is that you can learn lots of different things about a topic all in one place. It's like having a big treasure chest full of information that you can explore and discover from.