Could you please help me with some phrases?
"The problem is exposure,” Gansey told the phone, halfshouting to be heard over the engine. “If Glendower really could be found just walking along the ley line, I don’t see how he wouldn’t have already been found in the past few hundred years.”
They were headed back to Henrietta in the Pig, Gansey’s furiously orange-red ancient Camaro."
What does it mean - "the problem is exposure"? And what does it mean "they were headed back"? Just "they headed back"?
Thank you very much in advance!:)