Mr. Penumbra's 24-Hour Bookstore (Mr. Penumbra's 24-Hour Bookstore, #1)

by Robin Sloan

Fernwen’s eyes widened at that. Hadn’t they just braved a swamp of horrors to reclaim this enchanted trumpet? And now the First Wizard claimed it carried no real power at all? “Magic is not the only power in this world,” the old mage said