This book is for beginners to advanced users of LibreOffice Base, the database component of the free office suite. It introduces you to the most common functions of LibreOffice Base: creating a database; input and output of data; working with tables, forms, queries, and reports; using macros; maintaining a database; and much more. This book was written by volunteers from the LibreOffice community. A PDF version of this book can be downloaded free from https://documentation.libreoffice.org