"From time to time Microsoft Press has been pleased to offer free downloadable eBooks available as either PDF or XPS files. We are now very happy to announce that five of these same eBooks can be downloaded in two additional formats, DRM-free EPUB and MOBI. These new formats enable you to read these eBooks on ereaders such as Amazon’s Kindle, Barnes and Noble’s Nook, Sony Reader and Kobo eReader, as well as on iOS devices such as the iPad. Of course these files can also be read with ereading apps for the various devices (and other reading applications like Adobe Digital Editions) on netbooks, laptops, and desktop PCs. The key difference between these formats and the previously-offered PDF and XPS files is that the text is “reflowable,” meaning that it recomposes depending on the width of the screen (or as you resize a Window). For reading on Kindles, Kindle apps, or the Mobipocket readers for various devices, use the MOBI files. For reading on most other ereaders and ereading apps, including Nook, Sony, and iPad, as well as on PCs, use the EPUB files."
Thanks for sharing. I think, they are only available in EPub or Mobi format.
For PC users, you can download Mobi pocket reader for reading the MOBI format.