very well written and very well translated, or both. the "Days" really eaten very well. but if you are looking for the hard-SF, go your way. It was not what I wanted or what I expected but I am still took great pleasure in reading this book. Indeed, doing less than 500 pages and is these kinds of books is fun all through reading; and not like too many others where they are bored through hundreds of pages to take full right view in the end. In short, it's not my style but I was pleasantly surprised but not "up to the ceiling."