A new summer brings new challenges. 

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Marc shouldn't have a single complaint as he finishes seventh grade. He's done really well in his classes, his friends Kenny and Nathan have joined him at jiu-jitsu, and most important, he's been staying on the Warrior Kid path. 

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There's just one problem and that problem is named Danny Rhinehart. It seems like every thing Marc does, Danny does better. Danny runs faster, can do more pull-ups, has jiu-jitsu moves that Marc can't solve, and is even awesome in school. On top of all that, Danny is too nice-he smiles at everything and it drives Marc CRAZY. 

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Marc doesn't know what to do. Luckily, there is some good news: Marc's Navy SEAL Uncle Jake is back to visit for the summer. Maybe Uncle Jake can help Marc learn to handle a kid like Danny-a kid who is good at everything! 

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But it won't be easy. Marc will have to work hard, train hard, and learn to deal with a brand new kind of prob­lem: his own ego. It's going to be a tough summer, but where there's a will, there's a way ...