Knock out as many of the 27 Leaphorn, Chee and Manuelito of the Navajo Tribal Police books as possible. 

These books are what the AMC TV show Dark Winds is based on and have been coming back into popularity recently. Initially began by Tony Hillerman and continued by his daughter Anne Hillerman after his passing, she continues to write books for the series to this day.

There is no time limit for this challenge