An interesting perspective on the data returned by the spacecraft, and a nice technical detail explanation on the instruments on the spacecraft.
Unfortunately, it would appear the author(s) are not native english speakers, and/or this this ebook was a scanned/ocred copy of a paper book, because there were errors in it that wouldn't make any sense otherwise. Milliard instead of million, multiple times when million was used instead of billion, and at least one place where the complete wrong word was used. Proofreading is essential, especially so when publishing books of a scientific nature, since the primary focus of said books is for folks to learn from them. It does nobody any good if the learned information is wrong.
Despite the errors though, I did find this book to be informative, and it filled a gap in my knowledge that I'd largely not even known was there. It's a very fascinating book, and I highly recommend it to anyone who is interested in space or the exploration thereof.