Jedi Apprentice: The Shattered Peace

The Shattered Peace is the tenth in a series of young reader novels that chronicle the adventures of Qui-Gon Jinn and Obi-Wan Kenobi prior to Star Wars Episode I: The Phantom Menace.

Publisher's summary
The neighboring worlds of Rutan and Senali have long exchanged offspring to foster a lasting peace. This practice, however, has now led both planets to the brink of war. Leed, the heir to the Rutan throne, does not wish to return to his people. Qui-Gon Jinn and Obi-Wan must prevent this rift from turning into bloodshed.