Jennifer A. Nielsen continues the story of The False Prince in The Runaway King (Lexile: 710; Interest Level: Grades 5-8), the second book in the Ascendence Trilogy. During the funeral of Jaron's parents, right after he has been named King, a former friend tries to assassinate Jaron in his own garden. This attempt lets Jaron know that there are still problems for his beloved Carthya, and it is up to him to sort them out and keep his people safe.
Jaron steals away from the castle, putting into place a series of events that could bring either safety or destruction to his people. Following a path that lets him see what is really happening in his kingdom, who his friends really are and a chance to find allies in unusual places, Jaron goes back to living by his wits on the street.
If you haven't read The False Prince, you should definitely start there before reading The Runaway King, and then follow it with The Shadow Throne, the final book in the trilogy (see upcoming review). I find this series fascinating because it is a prince as the main character and his choices show grace, intelligence and grit galore! (352 p.)
One of the reasons I became an elementary school librarian is so I can read children's books.