Better than Farmville.

REUTERS ROBERT GALBRAITH

"My challenge for 2015 is to read a new book every other week," Zuckerberg wrote in a Facebook post, "with an emphasis on learning about different cultures, beliefs, histories and technologies."

The internet entrepreneur said he's looking forward to shifting his "media diet" to include more books. "Books allow you to fully explore a topic and immerse yourself in a deeper way than most media today," he wrote.

Zuckerberg has started a Facebook page called "A Year of Books" to document his reading and enable other users to join the book club. More than 90,000 users have already done so.

First on the reading list is Moisés Naím's The End of Power, a work that Zuckerberg says "explores how the world is shifting to give individual people more power that was traditionally only held by large governments, militaries and other organizations."

Perhaps aware of people's unfailing ability to veer wildly off topic in a Facebook thread, Zuckerberg has issued a stern notice. "We ask that everyone who participates read the books and we will moderate the discussions and group membership to keep us on topic," he wrote. So here's to the imminent discussion of books and arguments about U.S. foreign policy!