Jack discovers that he is the descendant of wizards, and has a special Warrior magic stone in his chest that sets him apart from other wizards. Two factions of wizards, the Red Rose and the White Rose, have been fighting for power for centuries. To minimize the bloodshed of the wars, they have a tradition of holding a tournament with two warrior champions who fight to the death. Now wizards of both the Red Rose and the White Rose are after Jack, either to capture him and use him in the game or kill him outright to stop the other side from using him. But Jack just wants a normal life in his sleepy hometown in Ohio. He just wants to play soccer in high school and pass his exams; maybe kiss a girl he likes. And now he has to train to fight and kill for a world of wizards that he knows nothing about. 

I liked the interesting world-building in this modern fantasy. There are different levels of magic-users who all have different rights under the wizard council. Warriors are almost extinct because they have been killed so much in the tournament. Enchanters and Seers are considered lowly in the ranks of magic-users, and it's perfectly legal (under the council) for wizards to enslave them. Wizards are at the top of the ranking, and they have all the political power. No one can stand against them... until Jack comes along.

I liked Jack's character because he is really determined. He makes a decision and sticks to it, even when things get tough. Even when it's painful or difficult, he just plows ahead with all his strength to accomplish his goal. He's also really protective of the people he cares about. He is willing to sacrifice himself, if it means keeping them safe. But he's also fairly dumb at times, making rash decisions, acting impulsively, and he has a nasty temper when he feels threatened. But it works for his character because he has a Warrior stone, which makes him rather volatile. 

The writing is okay. It's not brilliant, but it's not bad either. The pacing is good. 
I liked the supporting characters fairly well. Some of them are a bit cardboard, but most are okay. 
The plot is adventurous and mysterious as Jack learns about this world of wizards and the limits of magic. 
I liked that this book can be read as a standalone if you don't want to continue with the entire trilogy. 

There is a lot of violence, as you can imagine, and a few scenes where some warrior ghosts magically appear to warn Jack about eminent danger. But it wasn't scary. They were nice ghosts. 
To see details of all the violence and the ghosts and other questionable content, you can check out the book on the Screen It First website! https://screenitfirst.com/book/the-warrior-heir-heir-chronicles-1-1001