HOLDEN — Matthew Quick is a very big deal right now.

You wouldn’t know it, based on the casual way he saunters around his modest home in Holden, near Worcester. He’s mellow and welcoming, and there’s nothing about him that would suggest he’s any fancier than his neighbors. But he’s Oscar bait — or, at least, he’s the writer of a book that was made into a film that appears to be a frontrunner for this year’s awards season.