Killer Run is the 5th book in the Tourist Trap mysteries. I have not read any of the previous books and I can say that this book can easily function as a standalone with no issues. One of the reasons it can function so well as a standalone is the fact that the book focuses more on details about the characters and locations than it does the actual mystery.
The main character, Jill, is the owner of a Coffee & Book store and has agreed to sponsor a 5k race. Naturally, during the race a body is discovered. The plot definitely has promise and the characters and setting are enjoyable to read about, just not to the extent that they overshadow the mystery. For a book that's not horribly long (under 200 pages) I'd expect the author to really get into the "meat" of the mystery within the first 25 pages, at most. Unfortunately, the mystery does not really get going until around 40 pages, maybe even closer to 50.
Then once it does get going, it's pretty predictable and there are still a whole lot of unrelated things going on in the characters' lives that have nothing to do with the mystery. I don't mind a couple of subplots here and there, but I really don't need in depth detail about vacation plans, Jill's boyfriend's ex-girlfriends, and really unrelated things that don't add to the mystery in any way. If it was the first book in the series, I'd expect a bit more detail and getting to know the characters' personalities. But by the 5th book there should not be this amount of "fluff."
I give this book a 3 out of 5 and would say if you're looking for a great mystery, you should probably look elsewhere. But if you're looking for a light, easy read about the lives and goings on of a bunch of characters and the place they live, you may very well really enjoy this book.
For more information about the author and/or her books, you can visit the author's website. Killer Run is available on Amazon and B&N in eBook, Paperback, and Audio-book formats.