Lethal Vows - La Promessa

The characters walk such a fine line between good and evil, which made me wonder if that was intentional. Did the author want to challenge readers' perceptions of right and wrong?

The push and pull kept me on edge, but I sometimes wondered if it was too much. Did the pacing make the emotional payoff more intense for others?

The gritty atmosphere added so much depth, but I'm curious whether the author drew from personal experience or research to craft this dangerous universe.