Name: The Kite Fighters
ISBN: 9780440418139

Linda Sue Park

Eung Won Park

In Korea in 1473, eleven-year-old Young-sup overcomes his rivalry with his older brother Kee-sup, who as the first-born son receives special treatment from their father, and combines his kite-flying skill with Kee-sup's kite-making skill in an attempt to win the New Year kite-fighting competition. Reprint.

The Kite Fighters

Jeni Enjaian

I absolutely adored this book.
Park created a solid historical narrative with engaging young characters dealing with an age-appropriate problem without "dumbing down" the narrative. She kept many aspects of it such as word choice and syntax simpler but she never wrote pedantically. 
I fully empathized with the main character, his brother, and with the King. I also learned more about Korean culture and history, a fairly underrepresented topic.
I highly recommend this book.