conversion process. Click the 'Convert e-books' button in the top tool bar. This screen looks very complicated but realize that the majority of options here are correctly set by default. Most of the options only need to be changed in special cases. There is one option that is very important and may need to be changed. At the top right there is a drop down for 'Output format'. This controls what format the conversion will generate. Kindle owners will select MOBI and Sony and Nook owners will select EPUB. In the conversion dialog there are a few things to check before clicking 'OK' to begin the conversion. The first thing you need to do is double check the metadata and make adjustments if necessary. Click on 'Look & Feel' tab on the left side. The 'Remove spacing between paragraphs' option is a popular option. It will cause paragraphs to be formatted with a indent at the beginning instead of separating them with a blank line. Basically it makes the result look more like a printed book than the default, which looks more like a web page. Next click 'Page Setup', the first item under 'Look & Feel'. If you didn’t select your device during the welcome wizard, you should select it here. The input and output profiles provide specialized optimization for your specified device. Be aware that not all formats are affected by the profile. That’s it for the basic conversion options. Every option in the conversion dialog has a description of what it does, displayed when you put hover the mouse cursor over it. Look though the options and play with them to produce output that suits your taste. Clicking 'OK' closes the dialog and begins the conversion job. Look at the bottom right of the screen at the “Jobs” indicator. When it spins that means Calibre is working. Clicking it will show what job is being worked on. When the conversion is finished the jobs count will drop by one. When the job count drops to zero the indicator will stop spinning. After the conversion is finished click the downward facing arrow to the right of the 'Send to device' button. Select one of the 'Send specific format' options (main memory is usually the best choice). A dialog will appear asking you which format you want to send. Select the format you chose in the conversion options. 2.5: Limitations of conversion Converting between e-book formats does have some limitations. One limitation of using a tool like Calibre is the inability to edit the e-book content before conversion. Calibre simply moves the existing content and layout from one format to another. Calibre is not a editing tool. If there are typos you wish to correct or layout changes you'd like to make, you will need to use a dedicated editing tool such as Sigil or Book Designer . Another issue that often arises during conversion is missing or incomplete formatting. Not all e-book formats support the same formatting so layout details may be lost when converting from one format to another. Formatting attributes like bold and italics will be preserved in most cases but complex page layout may not be. MOBI and EPUB both support complex formatting so you won’t have to worry about this when using these formats. Finally, conversion will only shift what the input provides into another format. It will not add anything that was not already in the input to the output. So if the input is poorly formatted, the output will be too. 2.6: PDBs: they are not all created equal This is of particular importance to Nook e-book reader owners. Barnes and Noble sells e-books in both the EPUB and PDB formats. Both formats are supported by the Nook. PDB is not really an e-book format. It is a container for e-book formats. Think of it like a zip file. You put other files into a zip file so you only have to worry about having one file instead of many. That is essentially what PDB does for e-books. There are 28 e-book formats that can be put into the PDB container that I'm