--- title: Overview --- Books in Modopedia are formed by two parts: - The **book.json** defining basic properties about your book and its item. This is placed in a **datapack**. - **Content Sets** defining the categories, entries and localisations for your book. These are placed in a **resource pack**. ## Book.json Every book starts with a `book.json`, which is used to define the basic properties of the book such as the title, subtitle, type and more. This should be located in a **datapack** at `data//modopedia/books/.json` where `namespace` is the ID of your mod or namespace of your modpack, and `book_id` is the ID of your book. Both of these need to follow Minecraft's [ResourceLocation rules](https://minecraft.wiki/w/Resource_location). The full structure and available properties of `book.json` can be viewed [here](./book-json). ## Content Sets Books also contain **Content Sets**, which are groups of **[Categories](./category-json)** and **[Entries](./entry-json)** forming the content for each localisation (language) your book supports. All content sets for a book should be located in a **resource pack** at `assets//modopedia/books//` where `namespace` and `book_id` match those used for the `book.json`, and the `lang_code` is the localisation code for that content set (e.g `en_us`). This location will be referred to as the `BASE_LOCATION` of the content set. ### Entries An **[Entry](./entry-json)** is a collection of Pages with content on them, used to give information about a specific topic. For example, the "Iron Ore" entry might contain pages about where to find Iron Ore and what it can be used for. All entries for a content set should be located at `BASE_LOCATION/entries/.json` where `entry_id` will be the ID the entry is referred to within this book. The full structure and available properties of an Entry can be viewed [here](./entry-json). ### Categories A **[Category](./category-json)** is a collection of **entries** used for organisation and navigation. In some book types (for example `modopedia:classic`) a category is **required** for an Entry to appear in a book. All categories for a content set should be located at `BASE_LOCATION/categories/.json` where `category_id` will be the ID the category is referred to within this book. The full structure and available properties of Category can be viewed [here](./category-json).