Larry Flynt is at it again.

The Hustler founder is offering a $1 million reward for information on Mitt Romney's taxes, AdWeek reports. Flynt, an outspoken critic of Romney, is taking out two full page ads in Sunday's issues of USA Today and The Washington Post to publicize the offer.

The ad offers cash in exchange for "unreleased tax returns and/or details of his offshore assets, bank accounts and business partnerships.”

"What is he hiding?" Flynt said, according to the Hollywood Reporter. "Maybe now we'll find out."