A book would've been a fine idea, but with the number you have... I might well have picked up something you've got already.

[ Though that would have been a good idea.

Yuri strolled over to the kitchen and pulled something out he'd stowed under one of the counters. Upon returning, what he deposited on Byleth's lap was, apparently, a black lacquered box shaped like a fish. If he lifted it, rattling would indicate something within. ]

But I still think it'll be of interest to you.