I just reread 'Brian's Return' last week, and Brian's age is actually a fascinating detail. He's 16 years old in this sequel, but what's really interesting is how his age contrasts with his survival skills. Most teenagers are worrying about school dances or sports, but Brian's dealing with wilderness survival after his plane crash trauma. The book makes his youth stand out against his mature decision-making - like when he chooses to return to the woods alone. His age matters because it shows how trauma forced him to grow up fast, yet he still has that teenage impulsiveness that leads to both brilliant solutions and dangerous mistakes.