Peter Stuge wrote:

PDF is a digital sheet media. HTML comes nowhere near the tools
PDF offers for typesetting and typography. PDFs can be made beautiful
without a lot of effort.

Just wanted to add an alternative viewpoint. There's a great article
on typesetting a commercial book using only HTML and CSS at:
http://www.alistapart.com/articles/boom
With new additions to CSS 3, there's much more support for formatting
documents for printing, creating books, etc. There's a very useful
Open Source command line tool for converting from HTML to Postscript
or PDF:
http://code.google.com/p/wkhtmltopdf/
PhantomJS also provides capabilities for converting from HTML to other
formats such as PDF or graphics:
http://phantomjs.org/