When his dad first brought Cobalt home to cheer him up after his brother Will died, ten-year-old Alan wanted nothing to do with the mutt. But Cobalt was a special dog, and his strange blue eyes glowed with an eerie kind of understanding . . . just like Will's used to. Soon Alan realizes that Cobalt knows the truth behind Alan's death, and that he wants revenge. . . .
Used availability for Stephen R George's Deadly Vengeance
May 1993 : USA Mass Market Paperback
August 2015 : USA, Canada, UK Kindle edition