Olympians: Ares by George O'Connor
This is a series of graphic novels that focuses on Gods and Goddess, so if your kid is even slightly interested in Greek mythology they will love this series. What I love about the series are the strong female characters and the larger questions that it raises that can be applied to future discussions/lessons.
Ares centers on the famous Trojan War but specifically from the Gods and Goddess's perspective. It deals with sibling rivalry, parent-child relationships and the damage that can ensue when someone's only goal is revenge. Ares is the God of War and the story begins with the difference between him and his sister Athena, whose specialty is strategy of war while Ares's is pure destruction. This dynamic is a basis for a lot of sibling rivalry between the two. Great for reluctant readers, I always recommend graphic novels/comic books for reluctant readers and not so strong readers, it is a great medium to ease them into reading.
The first few pages are set in the middle of a battle, that being said there is violence.