There were a few things that a person could do to get a smile from Anthony. Offering to read a book was apparently one of them, though his grin was brief as he gave Justin a glance before returning his attention to his books. Thinking on what might actually be helpful -- he was thinking something along the lines of maybe a protection charm coupled with... something. Whatever made the sneakoscopes work the way they did. Or, as Justin had mentioned, a clock the Weasley family had. Maybe they could even make it extremely specific? There were a lot of ways they could approach this, really, and the list of potential details they could use to make it as specific as possible was huge. But then, even with all of that, it would have to work. It didn't matter how complicated it was if it left everyone arsed out in the end.
Anthony grabbed a book off his shelf, something on little known charms, and held it out to Justin. "I'm not exactly sure this one will really even be that useful, but I don't think it could hurt to try it out."