"Can I read you a story?"

At bedtime the other night, Colin asked if he could read me a story instead of my reading to him. He first chose "The very hungry caterpillar," which he read word for word (okay - he recited it word for word). But then he chose another book we don't read very often. He opened to the first page and stared for a minute, then handed the book over to me.
"I don't know this one yet," he stated. "Can you read it to me first, and then I'll read it to you?"
I agreed and read through the 16 or so pages, then handed it back to him.
He then proceeded to "read" the book back to me, word for word, page by page. Talk about memory!