If you are going to study Gaelic - and I recommend you do! - then this book is an excellent choice. I first bought the Kindle version. Now, I love my Kindle, but reading this book is best done with a hard copy in your hand and with the CD present.
Commenting on the book WITH CD, and you would be hard pressed to find a better beginning book. The lessons are graded appropriately for the level of learning, the material is appropriate and interesting, and with the assistance of the CD, you should be able to get a good grasp of the language in a few months. Using this book you will find that you need to skim back and forth to refresh your memory. You will be asked to check out the appropriate passage on the CD. This mixed media approach can be a boost for your memory, and I heartily recommend using the CD too.
Now to the Kindle version. I was unable to get the CD for download. It may be out there somewhere, but I could not find it. I also very quickly found that moving back and forth in the e-book was not easy, and that made my experience less successful. You can do it, the book is all there and it is an excellent book. In my experience though, as a lover of e-book format, you would be better advised to buy the hard copy version with the CD.