J. A. Jance 
Hour of the Hunter [EPUB ebook] 

The hunter is free to kill again — and hour by hour, he draws closer . . .The brilliant psychopath Andrew Carlisle spent only six years in prison for the brutal torturemurder of a young girl of the Tohono O’otham tribe. The testimony of Diana Ladd — a teacher on the reservation — put Carlisle behind bars, and now she can’t ignore the dark, mystical signs that say a predator has returned to prowl the Arizona desert. Because no matter where Diana and her young son hide . . . he will find them.