Is young-adult movie craze changing genre books, readers?

"The Maze Runner," a young-adult novel-turned-movie, opened in theaters September 19 and is one of many young-adult books to hit the box office this year.

But not every YA film is a success story. Kyle Buchanan of Vulture tried to decode the model for success:

According to Ben Schrank, president and publisher of Razorbill, the YA imprint of Penguin Random House, there's one surefire indicator by which you can cull the winners from the losers: Book series like The Hunger Games, Harry Potter, and Twilight were simply the most successful at crossing over into an adult readership, while most failed movie adaptations were drawn from YA franchises whose fanbases were still mostly made of, well, young adults. "That's the recipe for enormous success," explains Schrank. "When you see adults on their commutes reading the hardcovers of these books with their jackets removed, it means the movie has a far better chance of working."

On The Daily Circuit, we discuss Hollywood's rush to YA books. What has it done for readers and authors?