With a Little Bit of Death - Death Retired, #4

Spelled into SilenceBefore Clarence was a man possessing a bobcat, he was a murder victim. Now that he's beginning to trust Geoff, he's revealed a little of his background.and asked Geoff to find his murderer. Geoff can either do the legwork himself or unlock the spell that keeps Clarence from telling anyone who hurt him. What nefarious magic is meddling with Clarence's free will and why?