I read them in Kindle format and I see they go out of paper, divided into two volumes instead of 12 (it is better, at least you can read all at once!). So I can give them to a friend who has no Kindle, since the time I speak with him! For those who have read the first book and who hesitate to buy the second: it is actually better! In fact the beginning is not bad but not thrilling, and the more we advance, the more it grows in strength. I do not know from where, but after a while I became addicted. And then the end is great, I did not expect it at all!