Rachel Andrew presented on using CSS and HTML to create ebooks and print books. Key points include: - EPUB, MOBI, and PDF ebook formats are based on HTML and CSS under the hood. - The CSS Paged Media Module and CSS counters can be used to style pages, add page numbers and cross references. - Tools like Pandoc and KindleGen can convert HTML to EPUB and MOBI formats. PrinceXML can generate PDFs. - CSS techniques like page breaks, margins and generated content allow styling books for print or specific devices.