Thanks for having a look at this. I created a new gist focused on this problem: https://gist.github.com/chadrik/36d9490ea3b097d83aeb
It moves a chapter back and forth between two books in different ways, and shows that the history produced is different. chad. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.