Sometimes they think it well be in the spring, sometimes they say it's next week, sometimes they just shrug and admit that they just don't know-and why worry about it. No one at the mansion knows Jessica's due date. In fact, Jessica hasn't even been to a doctor. The problem is that no one seems to know or care exactly when the baby (or babies) will be born. Much of the plot concerns Betsy's best friend, Jessica, who is hugely pregnant. Although Betsy knows about some of the changes she wrought, she learns about some new ones in this book. Two basic plot lines run through the book, and both reach back to the changes Betsy made in the time line when she and Laura went back to the past during novels 9-11. The book includes one more trip to hell for Betsy and Laura, where Betsy learns that Satan doesn't want her dead and that Laura doesn't always tell the truth. In addition to working on her memory problems, Betsy is obsessed with the fear that she will become the horrible person that she saw in the future, so she needs to figure out how to prevent that. The whole book is like that, with some events and characters undergoing big changes and other events and characters essentially remaining the same. Now, he is a friend, which he never could have been in the earlier time line.

Here's an example of a change that shows up early in the story: Nick does not hate Betsy for biting him, because on this new time line, she never bit him. Authors use retcons when they want to move a story (or series) in a direction that would not be possible if earlier history remained unchanged. She includes the definition for retroactive continuity (aka retcon), a literary device in which the author alters previously established facts in a fictional work. Davidson reveals her reason for Betsy's reality shift on a page of quotations at the beginning of this book.

Undead and unworthy