NEW YORK (AP) — Pharrell Williams has launched a “Happy” campaign for young readers.

In this Aug. 30, 2015 file photo, Pharrell Williams arrives at the MTV Video Music Awards at the Microsoft Theater in Los Angeles. Pharrell has partnered with FirstBook, a nonprofit literacy organization, to donate up to 50,000 books to children in low-income families. Pharrell’s publisher, Penguin Young Readers, announced Tuesday, Sept. 29, that the Twitter hashtag #readHappy had been established for fans to post thoughts or images on why reading makes them “Happy.” Every post shared elsewhere on social media will lead to a donation. Pharrell’s picture book “Happy,” based on his hit song, comes out next week.(Photo by Jordan Strauss/Invision/AP, File)

The singer has partnered with FirstBook, a nonprofit literacy organization, to donate up to 50,000 books to children in low-income families. Pharrell’s publisher, Penguin Young Readers, announced Tuesday that the Twitter hashtag #readHappy had been established for fans to post thoughts or images on why reading makes them “Happy.” Every post shared elsewhere on social media will lead to a donation.

“Every child on this planet deserves to experience the joy of reading,” he said in a statement issued through Penguin

Pharrell’s picture book, “Happy,” based on his hit song, comes out next week.