Working on the front matter for Isle of Swords now. With The Door Within Books, my editors and I agreed it was a good idea to include a List of Characters and Principal Settings, each with a pronunciation guide.
For Isle of Swords, my editors again have asked for this. We are also including two diagrams" a map of the Caribbean and a line drawing of a typical tall ship. We are debating a list of nautical terms: aft, keel, starboard, etc.
Interestingly, some folks didn't like the character/setting lists in the DW books. One even said, it bugged them--found it insulting.
I don't know. I think for a YA title, its good to have them. What do you think?