Mario Lopez Shirtless for New Book

So we've already reported about A.C. Slater's new fitness book, but Extra has graced us with some new propaganda that's sure to sell a few copies.

Hey, anytime Mario wants to get naked, we're here for him.

Mario Lopez: Your Personal Trainer!

A.C. Slater wrote a book!!

Well, sort of. "With" Jeff O'Connell, which means Jeff O'Connell probably actually wrote all of the actual, you know, words. But did he write Slater's abs?? We think not!

Those were painted on by the Olly Girls of Sunset Tan!

But he's still freaking hot. We'll totally buy his book.

IF his book of full of pictures of him "working out" with Zack Morris! And by working out, we mean...well, you know what we mean.