John Flanagan returns to the world of Ranger's Apprentice to find out what happens when Will's apprentice, Maddie - the Royal Ranger - returns home to Castle Araluen.

The Kingdom may have been at peace for a number of years, but there are always those who would commit treason to take power for themselves. When Maddie learns of a plot against the crown, she must go undercover to find out more - and hopefully stop it. But going undercover isn't easy when you're the princess - even if you're trained as a Ranger.

Following on from Ranger's Apprentice: The Royal Ranger is a second book of Maddie's adventures. Princess by day, Ranger's apprentice by night, Maddie must keep her identity secret at all costs, for the sake of the Kingdom.