It's difficult deciding which is more nightmarish Charlie Rankin's past as an abused kid or his present as an ex-con who owes his jailbird lover one last favor. Rankin himself can't separate his identity as a hardened criminal from that of a terrified victim, and his ex-porn-star girlfriend is the only one who doesn't think he's crazy. In ''the flickering recesses of a hallucinating brain,'' Rankin sees himself as a child, imagining ''Little Charlie's face, corpse-white, dead as a shed fingernail'' in the midst of committing a savage crime. A swiftly paced thriller about a hit gone wrong, Matthew F. Jones' Boot Tracks is also a brooding character study of a man who's morally compromised though not entirely soulless.

