Books with title Daphne's Book

Daphne is the weird girl in Jessica's class--the one no one wants to talk to or even be seen with. But when the girls are assigned to be partners in the Write-a-Book contest at school, they find they have a lot in common and start spending time together outside of the project. As their friendship deepens, Jessica stumbles on a terrible secret about Daphne's life. Jessica promises not to tell anyone. But sometimes it takes a true friend to break a promise instead of keeping one.