Rick Riordan said this quote
“ 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? ”