Edward Waverley, a young English soldier, is caught up in the Jacobite rising of 1745-6, the last civil war fought on British soil and the attempt to reinstate the Stuart monarchy. With Waverley Scott invented the modern historical novel and profoundly influenced the development of European and American fiction for a century at least.
There are all sorts of good reasons to read Waverley; it's important, influential, deals with issues of identity and political loyalty which are most certainly still relevant, is interesting to read against the current political situation in Scotland too, but much more than that its also enjoyable.