The Decline and Fall etc. is THE Work by Gibbon. It is a very challenging read. The English language has evolved a lot since the late 1700s when this work was written. It contains a lot of infromation, though somewhat shaded by Gibbons world view, he gives a very interesting version of the history of the early Christian Chuch. With a bit of effort it is a very rewarding read. Do not expect to get through it in a few days.