Justin noticed the grin, however brief, and was glad he could make his friend smile if only for a moment. He took the book handed to him and immediately flipped it open to the Table of Contents to get a handle on what he was dealing with.
"I don't know how you work, so did you want me to let you know every time I find something interesting, or should I make a list to go over afterward?"
He may not have been overly intelligent, or organized, but he was a Hufflepuff, and therefore ever willing to work hard for a good cause.