John Flanagan is an Australian author best known for his popular series of novels called Ranger's Apprentice. The series, which began in 2004, follows the adventures of a young boy named Will Treaty as he trains to become a ranger, a skilled protector of the kingdom. Flanagan's engaging storytelling and well-developed characters have made the series a favorite among young readers. In addition to Ranger's Apprentice, Flanagan has written several other series, including Brotherband Chronicles, which focuses on a group of young warriors. His books often emphasize themes of friendship, bravery, and personal growth, appealing to a wide audience and encouraging a love of reading.