British designer, Mark Bowley created his ebook "Tiny Design Lessons" using Airtable. Each page is a row in his database. He used an Airtable app called Page Designer to generate the layout for each page and then printed the book out and saved it as a PDF. He then created the cover and the table of contents using Keynote.
Read the full article here: https://blog.airtable.com/bookdesign/