Toby, the King's page, has a devastating secret. He cannot read. When a nasty boy named Harley finds out, he tries to blackmail Toby into stealing from the palace. With the help of his friend Olive, and the new tutor, Mr. Snipperside, Toby finds the courage to deal with both Harley and his reading difficulties. Courage of another type is needed by both children when a forest fire threatens Concordia and all they hold dear. "Under the Summer Sun" continues the Concordia series begun in "Pretend Princess."