Note: Name : anti-mondes (note the lack of capitals) Publisher : OPTA 24 rue de Mogador 75009 Paris Period of activity : 1972 to 1977 Series' Editor : Michel Demuth. Number of titles in the series : 34 Numbering system : straight numeric from 9 to 34 (note that the fist eight titles are unnumbered but clearly in sequence). #35 was scheduled to be _All Times Possible_ by Gordon Eklund which will be later published by OPTA as part of the CLA series. Format : tp , 13,5 x 19 (stayed the same). Length : variable, usually in the 250 pages range, with exceptions (the longer Piers Anthony, the shorter Baronian). Presentation : stayed the same with only the main color varying. Artists : generally original artwork from french artists specially commissioned for the books. Reprinting policy : no reprints are known. Origin of texts : essentially first french publications, then some titles coming from other OPTA series (Farmer). Bibliographical data present on the books : Dépôt Légal and ISBN are present but ISBNs are sometimes given to multiple books. The presence of AI is variable (depending on the printer). The illustrators are generally credited. The english titles are generally given. Content : The series has only one collection. Some titles were sometimes issued with a "Bandeau" (aka Obi or Belly-Band), see here for more.