Whose that author?

“She's going to do nothing but try to trick information out of me that I shouldn't be giving her, Mac," I said.
"Ungh," Mac agreed.
"Why did I say yes?"
Mac shrugged.
"She's pretty," I said. "Smart. Sexy."
"Ungh."
"Any red-blooded man would have done the same thing."
"Hngh," Mac snorted.
"Well. Maybe not you."
Mac smiled a bit, mollified.
"Still. It's going to make trouble for me. I must be crazy to go for someone like that." I picked up my sandwich, and sighed.
"Dumb," Mac said.
"I just said she was smart, Mac."
Mac's face flickered into that smile, and it made him look years younger, almost boyish. "Not her," he said. "You.”