This is book three in the Border Portal series. You do not have to read them in order to enjoy each one. It is the second book I have read by Darlene L. Turner. She definitely does suspense well. Unlike some suspense novels, you do not have to wait one page before the suspense starts which may be because these books are short. And the puzzle draws you in and holds you there until the very end. I definitely recommend this book.
Disclaimer: I received a free copy of this book in order to give an honest review.