Just for the record: Alec is quite obviously lying out of his ass! The reason I say that he’s lying is because Alec, or hell even Isabelle didn’t mention once that they tried to actually get hold of their parents. No, they said that no one was answering at the Silent City, and that was basically it. And then they left Max alone by himself, which is at least here in Texas is fucking illegal as hell. Then they went charging into the Silent City with zero backup or even a fucking plan.
Also, I know I have asked this several times, but what year is this again? Because this book is supposed to take place in 2007, and I know for a fact that cellphones were pretty much a common thing back then. Hell, Jace had a cellphone back in City of Bones (which he then conveniently forgot that he had), but the Lightwoods don’t have a cellphone? Not even one of the Razr phones that were so popular back then for their age group? Aren’t they supposed to also blend in? My own mother can barely program her DVD player and she has a smart phone. In conclusion: there is really no excuse for this lack of communication.