If you simply need a small application to delete, merge a page or a few pages to your existing PDF files, then I would highly recommend a Linux application called PDFshuffler. It is extremely easy to use. You can import as many PDF files as you want for you to rearrange page order or even delete certain pages – no, you cannot edit texts or images on each page. Once you are satisfied, you simply export the final result as a new PDF file...Read More
Calibre is primarily a ebook cataloging program. It manages your ebook collection for you. It is designed around the concept of the logical book, i.e. a single entry in the database that may correspond to ebooks in several formats. It also supports conversion from a dozen different ebook formats to LRF and EPUB. A graphical interface to the conversion software can be accessed easily by just clicking the “Convert E-books” button.
Supported input formats are: MOBI, LIT, PRC, EPUB, ODT, HTML, CBR...Read More