"River Marked" by Patricia Briggs is the latest installment into the Mercy Thompson series. It would most definitely go under the Urban Fantasy genera.
For those of you not familiar with this series: Mercy is a coyote "walker" (even though in this book they talk about how that is not exactly the correct term because she is not evil - she is more of a shape shifter). Mercy was raised by a pack of werewolves in Montana, but has moved down to the Tri Cities area of Washington state, where she makes a living as a mechanic. She is a magnet for trouble from everything possible it seems, and has found a new family in the local werewolf pack.
I personally love this whole series. They are all really fun reads. This particular book is set on the Columbia River. She and Adam are camping and they of course run into a monster that is killing people, and they have to figure out how to kill it.
I'm not going to say that one needs to be some sort genius to read this book, but I love how she inserts all of the Native American legends into the story. You can tell that she did her homework, and she presents it in a way so that the reader does not have to.
I recommend this book to any one who likes a bit of adventure, and the paranormal. Briggs also happens to be pretty witty. I laughed out loud reading it a few times, and so did my friend Cate.
