What is the main conflict in Different Seasons by Stephen King?

Stephen King combines four fiction novellas like seasons with characters like falsely accused prisoner Andy Dufresne and his friend Red Smith in “Rita Hayworth and the Shawshank Redemption”, Nazi in hiding Kurt Dussander and his student of murder Arthur Denker in “Apt Pupil”, four young boys in the 1960s searching for missing boy in “The Body” and Dr. McCarron with his strange tell a delivery that couldn’t be stopped in “The Breathing Method”.