It’d be funny if Mark read Nolan’s travel books thinking that’s what he meant. Just saying “Well, I know the sites I’d love to see when vacationing in Italy but, how does this help me fight Viltrumite’s?” Although, I think in the comics, Art kept copies of the books cause he was a big fan of them.
This episode ends around the same place as issue 29 so if you’re looking for somewhere to start, I’d start from there. I will say however, the comic does develop and expand on some stuff the show hasn’t so if you’re interested you could go back and read from the beginning, it is a bit slow at the start but it really picks up.