I would like to give this book an unbiased rating, but this whole star system makes it impossible. What I expect/want from a Mucha book is just personal preference, but this book was not spectacular nor is it terrible.
For the first 1/5th of the book, it was a very lengthy biography. Whether it is accurate or interesting, I can't say because I didn't read it myself since I checked this out from the library before toying with the idea of buying the book. There were about three to six images to accompany the text, but the sizes range from 2 x 3inches to 3 x 4inches, which is not very big, considering how I like to see the image in full detail. For 1/8th of the book, it shows the popular prints/posters Mucha is known for, the majority of them covering the entire page. A few images are accompanied with sketches/studies (some I've never seen before) Mucha did before producing the final product while others have paragraphs of background information.
About 1/5th of the book has his oil paintings, many of which I have never seen before, most which do not have the typical style Mucha is known for (abstract organic lines, incorporation of nature, pastels... just think of his poster works). It also has background information and sketches/studies like the popular pieces section I mentioned earlier. The rest of the book has an even amount of images in regards to his photography, sketches, and non 2D related mediums. In the back is a listing of the images shown through out the book, with the the title, size, medium, date, so on and so forth, then there are about 6 pages of thumbnails not shown in the book with their descriptions. They're so tiny (about 2 x 1.5 inches big) you can't see any of the detail. I guess if you want to say that you've seen it and acknowledge its existence, it could be useful, but other than that, I don't know why you would even bother.
So, in summary, this is a very image heavy book, and show cases a portfolio with a variety of mediums Mucha mastered in. If you're looking for a book with novel Mucha pieces, this book is it! But if you're looking for iconic Mucha pieces, look elsewhere.