I think someone already asked this before, but I really want to know how to use these. I think they work like parentheses, but I'm not really sure. However, I know that these are used a lot in all kind of books, I took an example from Brisingr (The book I'm actually reading): She said, "Galbatorix's true name is no great secret. Three different elves--one a Rider, and two ordinary spellcasters--discovered it on their own and many years apart." I can note there are no spaces in between, and that they bear similarities to the parentheses. Help please?