Zombie books

"I create zombie novels," she said.

"That's great!" he enthused. "Zombie stories are really popular right now."

"No. You don't understand. I don't write books about zombies. I make zombie books!"

"Oh..." he replied. "Um... I guess I don't know what that means."

"Listen. Zombies are the living dead, right? Books are made from trees, which were once alive. Now they live again!"

"So, every book is a zombie, then?" he asked.

"No. Zombies also eat your brains." she reminded him.

"Er--"

"Here," she said, "Try this one!"

The book had a shrivelled, bluish-white cover. It was moaning softly.