Dark Drift (K-9 Fugitive Unit Book 3)

A protected witness walks into a dead Nevada mining district with a ledger in his head, and three crews go in after him.

Caleb Ross and his Dutch Shepherd, Rook, have to find the witness first, in old tunnels and empty towns where every crew is armed and only the dog can tell who passed this way.

Dark Drift is Book 3 of the K-9 Fugitive Unit series.