I was recently made aware that there is a free online Pub to PDF conversion tool available. This tool will convert your Microsoft Publisher file to a PDF format suitable to send to recipients who do not have a viewer installed for Microsoft Publisher files.
Website: http://www.publishertopdf.com/
Free Publisher to PDF Online Conversion Tool
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I have here another converter, from PDF to kindle formats and not only, which is also very useful: http://kitpdf.com/. Hope it helps.