The Intern's Handbook rights have been bought by Sony

The Intern's Handbook: A Thriller - Shane Kuhn

"Sony Pictures has nabbed the rights to The Intern's Handbook: A Thriller, with plans to turn the project into a vehicle for actor Dave Franco."

 

 

Why are so many rights being bought before the books are even out/ or just out to read?

Source: http://www.hollywoodreporter.com/heat-vision/dave-franco-star-interns-handbook-704665