There’s a lot that we don’t know about Matt BaierTeen Mom OG star Amber Portwood’s boyfriend who seemingly appeared from nowhere.

At least there’s a lot we don’t know now, as he soon plans to reveal all in an upcoming memoir called You Have No F–king Idea: The Naked Truth About My Life. So what do we know about Amber’s elusive fiancé?

Scroll through the gallery to find out!