As quoted in the Wall Street Journal:
"There has been a real revolution" in books that "have more kid appeal," especially when it comes to boys, says Ellie Berger, who oversees Scholastic's trade division. "It's a shift away from the drier books we all grew up with."
And I would love to know whose ass this statistic was pulled out of:
Last year, U.S. publishers released 261 new works of juvenile fiction aimed at boys, more than twice the number put out in 2003, according to Bowker's Books in Print database. There were 20 nonfiction entries for boys, compared with just four in 2003.