" Sam's phone buzzed. She fished it out of her pocket, checked the screen, and cursed. "I have to go."

"You just got here."

"Valkyrie business. Possible code three-eight-one: heroic death in progress."

"You're making that up."

"I'm not."

"So...what, somebody thinks they're about to die and they text you 'Going down! Need Valkyrie ASAP!' followed by a bunch of sad-face emojis? "

― Rick Riordan , The Hammer of Thor (Magnus Chase and the Gods of Asgard, #2)