I was only a few pages in and noticed several typos and inconsistencies, so I didn't want to keep reading. For example, there was a note regarding if a solution seems way off from what would be common sense, calculate again. On the next page there is a problem in which a kid was timed running 24 feet in 12 seconds as a given. If you think about it, one would have to crawl in order to take that long to cover that distance!

I understand that interactive iBooks are a novel idea but I want to remind not just the authors of this books but future authors for iBooks that the absence of well written contents cannot be helped by technologies. For instance, the concept of Doppler's Effect in this book took only a few lines of explanation. I felt like the author was skimming over the subject matter. Some kind of audio illustration can also help but more text and diagram to explain it is needed.