Sigil for Linux (64-bit) is a multi-platform WYSIWYG eBook editor. It is designed to edit books in ePub format. It is free and open source software under GPLv3. It provides full Unicode support, WYSIWYG editing, and support for Book View, Code View, and Split View. Sigil for Linux includes Metadata editor with full support for all possible metadata entries (more than 200) with full descriptions for each. Sigil for Linux features Table of Contents editor, Basic XPGT support, and Multi-level TOC support.