Open Custom Knowledge under Settings and select the option to create a knowledge base. Add a clear name and optional description, then open it to upload files.
Supported uploads are PDF, DOC, DOCX, and TXT. Keep each knowledge base focused on one topic or source set so it is easy to choose later.
When creating or editing a brief, select up to five knowledge bases under Custom knowledge. Books uses the attached material during eligible planning and writing. The generation quote shows any knowledge-base fee before you start.
Removing a file or deleting a knowledge base does not rewrite content that has already been generated. Delete a knowledge base only when no future brief needs it.
