Note: Note that the variable positioning of the metalic foil and its associated effects may create the illusion of different covers. There are also known cases where the metalic foil motif is not the same for the same printing. If it's the first french publication of a book, it has a silver color, the reprints of other french publishers (including serials) have a gold color and three known essays are more orange. The reprinted volumes have (at first and sometimes) a black star on spine. Dimensions: 21.5 x 13.5 cms The Publication Series# as shown on nooSFere.org is not known to be printed on any book of this series, yet. If there will be found any indication that it was printed for the latest books or on reprints, the series# can be put in in braces for the earlier ones.