This is a collection of projects from the instructables web site. The transfer to Kindle isn't that good (there are obvious formatting errors and as others have noted none of the hyper-links to videos in the articles work). Also, as a collection of projects it doesn't have much structure - if you're beginning with Arduino this isn't a good place to start.
Finally given the poor transfer to Kindle the most frustrating aspect of this eBook is that it cost me £1.99 when it is downloadable for free from the instructables website in ePub format (and easily converted / loaded onto your Kindle). Had I known this before I wouldn't have bought it.