I have the German edition of the first one ("Roberto Light"), which is around 100 pages in A5 format with soft covers. It contains seven routines, each comprising three tricks; sometimes they are linked, sometimes the idea is that it's easier to memorise them in groups. The tricks themselves are technically not difficult at all, and everything is explained in great detail along with the thinking behind the methods, subtleties and sources. There are also lots of nice Card College-style illustrations by Mr. Giobbi's wife. It's been several years since I read the book properly, but I believe most of the effects are either the author's own or else his handlings of things by others. According to the introduction they are all taken from Giobbi's working repertoire and are designed for both at beginners and experienced magicians who just want foolproof material that doesn't require too much technical ability.
I don't have the other two but am thinking of getting them as they are sure to be of the same quality. There's also a large hardback book called "Card Perfect" and a manuscript of ace routines called "Fantasia in As-Dur" (Fantasy in Ace Major), both in German. I saw the former about 10 years ago and now regret not getting it, as I believe it's out of print.
The "Light" series would be an excellent translation job for someone (me, for example, if I didn't have two small children and 10,000 other things to do), especially given the success of Card College.