The Illinois Detective Agency (Book 2)
On the night of the full moon in Wyoming Territory, somebody dies by being scalped. Governor Hale turns to Charles Porter. Porter assigns Joe Charles, Tom Adcock, and Joseph Goodluck to the assignment. Goodluck tracks the killer to the Pine Ridge Indian Reservation. Goodluck learns nothing and returns to find Adcock and Charles have been murdered. Porter sends telegrams to James Duffy and Jack Cavill to return at once. They are reunited with Goodluck and travel to Wyoming to hunt down the killer.