IBOOKS File

<p style="text-align: justify;">The .IBOOKS file extension is basically an eBook application program developed by Apple Corporation. This file format works for the OS X and iOS operating systems and devices. The format was released in conjunction with the launch of the iPad on January 27th, year 2010, and later was released for iPod Touch and iPhone in the mid of 2010 as a vital part of the iOS 4 upgrade.<br /><br />The .IBOOKS file format is not a pre-loaded extension on the iOS devices, but users may install it for free from the iTunes store. In year 2013, the .IBOOKS file was officially provided with the OS X Mavericks.</p>