It was about the size and thickness of an English textbook.
It was dirty, worn out, and full of fingerprints, maybe because it had been well-used.
The slave trader said,
"Human kids who know the Demon Continent Language sell for a high price, so learn it."
".......why should I even make an effort to raise my price when there's nothing in it whatsoever for me."
"Of course there's a benefit."