Some parts of this book are really a 5, but others, 2, so this is a middle ground. Donna has decided to retire, but is to hire her replacement. It's kind of funny that each of three vying for the job end up getting killed by some weird accident, but what I didn't like was how obvious it was that Donna didn't want to retire in the first place.
Instead, she became more of a snoop with Jack and the team, and took on a ludicrous first dance for Jeff's class. All the problems Penelope causes make no sense, but of course, the hotel they have the dance at becomes handy later on.
The last third of the book is much better, with Donna involved in saving the president, a fun frenzy with the dance for the kids, and a certain return to sleuthing with Jack.
The death of Jack's new partner, Mara, out of retirement to help on the case, was very sad. The new baby, Nicky, for Emma and Arnie, is cute, and their wedding, a nice ending to this book.