C301 The Inside Story

Smack! Smack! Smack!

A crisp slapping sound spread throughout the room. The sound gradually weakened after passing through layers of solid wood bookshelves. Finally, it faded away.

This was a very spacious room. Dozens of bookshelves were neatly arranged. Various types of slightly ancient books were piled up on every shelf. At the very end of these bookshelves