More Chapters, Not My Own

I've been spending my time of late working on another book, however it's not mine. I'm writing chapters for someone else's book (a ghostwriter so to speak). It's fun and bawdy and the characters are very interesting so it's a joy to write. I just wish it were my book. I am getting paid to write these chapters so it is not only a study in writing but a job. Of course, I can't tell you a thing about it because I've signed a Confidentiality Agreement. I do hope this book is a giant success but it will kill me if it gets published before mine.