Last night as I was falling asleep, my brain was attacked with ideas for the next two books in my work in progress. Naturally, the ideas that flooded into my imagination are going to completely change the next two books from what I had originally planned. Now the book that was supposed to be the third in the series is going to be the second book in the series and the original second book is going to the third. Now I must begin planning all over again. I think I am going to like how the story progresses better this way, though!
Do your book ideas change on you out of the blue?