On a Apple computer, the “Print” function of the “Preview” app includes the choice for printing the open file to PDF. This works for converting various picture formats to PDF. In fact, any open printable file can be printed as a PDF. If your objective is to make a PDF into a searchable PDF, Pdf Converting works. There are some “free” software listings on the Internet, but I can’t suggest one or another. On a Apple computer, if you just want to merge two or more PDF files, click theft-most icon above the main PDF window. There’s dropdown with several choices. The second is to open “thumbnails”. Click it; you get thumbnails of every slide in your PDF file. Do this with both of the files you want to merge. Drag thumbnails from one file to the other - in the order you choose. You now have the merged file. (This is probably identical in the Windows operating system.) HTH
Convert PDF files for pub Using the above software to convert PDF to pub format will not work only with Word, Excel, PowerPoint, OneNote and other word processing software, all available. If you wish to use these apps on the desktop, e-reader software, like Kindle Fire, Android tablets, iBooks, Nook Books, Kobe etc. then you need to get pub converter, which will convert pub files to PDF, and send the file to your reader. If you have any question regarding this blog post, we do not answer them in comments.