Destiny's Sleight of Hand

Lupin cleared his throat, making me look back to him. "Well, what's got you so worried?" I hesitated for a long moment, not knowing what to say. My first instinct was to declare in annoyance that he knew exactly what was bothering me. But I didn't say that. Instead, I lowered my eyes to my book and murmured, "There's just something that I can't get my head around."