The fourth book of the Queen Betsy series is where the series settles down into the episodic status quo which will be maintained for a good number of years. Eventually, Mary Janice Davidson will disrupt this status quo with some dramatic events that will polarize her fanbase. Here, however, it's just the comfortable Addams Family-esque world of the adult Buffy and her oddball collection of friends.
A good idea of how the Queen Betsy books work can be explained with this book as an example. There's a serial killed loose in Minneapolis and it's not Betsy's problem. The Driveway Killer is on the loose, targeting blonde leggy women who fit Betsy's profile. This in no way impacts Betsy's life or concern until a victim's ghost physically inserts herself into Betsy's life and demands she solve the murder. Even then, Betsy forgets about it like three times.
To liken the books to a television show, it's best to think of them as a supernatural Seinfeld. They're the vampire series about nothing. Events happen but the Betsy characters generally try to avoid actual plot as much as (in)humanly possible. To give you a sense of Betsy's priorities, the Driveway Killer being stopped ranks below her starting a literal advice column where she makes up the letters to her. Also, a (former) vampire hunter writing her biography which he can't publish.
While Queen Betsy works entirely well as a slice-of-life comedy and romance, I also think it functions as a parody of the typical urban fantasy drama out there. In Anita Blake or other works, the serial killer is a pulse-pounding, nerve wracking drama which inevitably is revealed to be some sort of supernatural character which only our heroine can stop. Here, the Driveway Killer is a pathetic manchild with women issues. You know, like actual serial killers tend to be. It's little details like this which keep the books fresh and interesting.
I love the relationship between Betsy and her sister Laura here, which gets developed in the not-hunt for the Driveway Killer. Betsy assumes Laura is the sweet and church-going better sister of the family but, in fact, Laura has a temper the size of Hell. It lays an interesting groundwork for future stories where Betsy has to reign her in and prevent her from lashing out with all of that repressed fundamentalist rage.
There's actually a fairly terrifying scene where Laura almost kills Betsy, or would if not for the fact she's the Queen of the Vampires and immune to being staked through the heart by a demon sword. It's not quite up there with Betsy getting into a fist-fight with Satanic Lena Olin but it's one of the more surprising moments of the series.
Oops.
This book also marks a permanent change in the relationship between Betsy and Sinclair, moving them from King and Queen in name only to something more permanent. I really like the relationship between these two as the irreverent Betsy makes a good contrast to the more traditional vampire Sinclair. The back and forth between the two could have been dragged out indefinitely but while I didn't much care for their fight over telepathy (she has it, he doesn't), I felt the change at the end of the book really worked.
What makes Sinclair and Betsy's relationship work so well? I think it has to do with the fact they're both flawed people who play off each other well but also compromise a lot. In a lot of paranormal romance, the male is either idealized perfect or controlling. Sinclair is constantly learning to give up control as a vampire but unafraid to apologize when he's being a dick. Well, eventually unafraid to apologize. Likewise, he does have feelings which Betsy often hurts by her unfamiliarity with vampirism.
In conclusion, Undead and Unreturnable is a fun book and another great installment in a stand-out series of comedic hi-jinks. Nothing really happens much in this boo but that's kind of the point. While not quite as enjoyable as Undead and Unwed, I still had a lot of fun with this book and think you will too.
8/10