The Edge of Worlds (The Books of the Raksura #4)

by Martha Wells

“I’m not supposed to be doing anything,” Stone retorted. “I don’t know if you noticed, but I’m old.” “That’s never stopped you before,” Moon countered. “We’d all be dead without you.” Stone snapped, “And now you don’t need me.” Moon pounced on that. “Hah, that’s it! You’re not bored, you’re just—Mad because you think we don’t appreciate you!” Stone snarled, “That’s the most idiotic thing you’ve ever said, and we both know how tough the competition is.”

‘If eyes fall on this, and no one is here to greet you, then we have failed. Yet you exist, so our failure is not complete.’”