Case of the Unbolted Lightning

Very good murder mystery, where the 2 sleuths stay a bare step ahead of the fendish murderer. (The murderer is relentlessly trying to stop the sleuths from finding out who he is.) The sleuths are Christians, and not shy about it (the book doesn't get "preachy.") Murder mysteries are not my favorite type of book, and at 195 pages, it surprisingly kept my interest long enough to finish it in a single sitting.I gave the book 4 stars instead of 5 simply because the author made numerous mention of other cases the sleuths had solved, and gave away the plots of those books. I would much have prefered a number on the cover to show where in the series this book was, and then found the others to read at a later date.