I was just wondering if there is a best method or tried and tested way of writing a book in 1st Person, yet write for multiple characters? I would normally give a character a dialect, or a feature that I could reference. However, this time the multiple characters are clones of the same person, so I've probably done something impossible. Currently I use different colour highlighter pens to keep track of each character, but I can not do this in a book. Any thoughts? And yes it does have to be in first person.