THE FUTUROLOGICAL CONGRESS & THE     INVESTIGATION  by Stanislaw Lem                                           Avon Books, First U.S. paperback editions, 1976                        Condition: Near Very Good & Good                                                                                                                                                                                     Principally in the 1960s & '70s, Stanislaw Lem was one of the best-selling science fiction writers in Europe and was also popular in America.  These are the first paperback editions of two of his best novels, one funny, the other serious.  CONGRESS has some creasing, a "75" marking and  the price marked out, otherwise in very nice shape.  INVESTIGATION has exterior creases and some other wear, moisture discoloring and some page rippling and small writing & markings inside at  front.