I'm writing a book series (I may or may not publish it, not sure) that I'd like to have as 5 books long. I have four main characters, and I want part of the story to be three of them dealing with the other's death. However, I can't figure out which book that character should die in. I'm thinking either books 3, 4, or 5, but is 3 too early? 5 too late? Should the character die at the end of the book? I'm also planning for the three remaining to meet someone else to "join their party," so should I do that in the same book, or the next?
Sorry if this seems like too many questions, but here's the gist:
When should one of my four main characters die in a 5-book series, and when should I introduce the new fourth main character?