Starting from 1969 "Rivista del Nuovo Cimento" has taken the place of the "Supplemento al Nuovo Cimento". While the latter had been published as a collection of monographs or congress papers with no specific periodicity, the "Rivista", at first introduced as a three-monthly journal of review articles, has now turned into a monthly journal of monographs. It deals with topics of particular scientific interest and with up-to-date issues pertaining to different fields of physics. These monographs, which illustrate the state of the art of specific topics of relevant importance in modern physics, usually are invited papers.