During the second chapter in the main camp, you will meet with Jack, who will give you the task of finding a comic strip. There are four such comics in total, so the exact location of each of them is indicated below.
Otis Miller and the Arab Prince
You will find a cottage here - go inside and examine the chest of drawers next to the bed.
Otis Miller and the Lady with the Black Heart
Here you will find a hut filled with corpses. The comic is on the nightstand next to the rocking chair.
Otis Miller and the boy from New York
In the indicated place you will find an abandoned village with a school - go to the teacher's desk.
Heroes of the Wild West number 132
Enter the green house and you will find a comic strip on the nightstand next to the bed.