Man Hunt and Woman Scorned by K Edwin Fritz

K Edwin Fritz is the author of Man Hunt and its sequel Woman Scorned. The books feature an Island in the middle of nowhere, where a group of women keep a group of men hostage. 
The men are tortured, brainwashed and then made to run on the island to try and reach the final area where they can claim their freedom.
The men are all guilty of crimes against women such as rape and assault. The women are all victims of such crimes who have come together to exact revenge. However they consider it justice.
It soon becomes clear that both sides are as bad as each other.
The story shifts between several main characters, both male and female and it is hard to pick a side. 
Ultimately you realize though that there are no sides. Both are just trying to survive.
Visit K Edwin Fritz's Goodreads page to find out more: 
https://www.goodreads.com/author/show/3140845.K_Edwin_Fritz