We can't find what doesn't exist.

Spring is on it's way and the Murder Goose has come out again. He caught wind of one of the most irritating patrons we've had in recent memory at Tartarus. The following conversation really got his goat.

This woman came up to the desk with her demands. "You all have this book. It is about an Indian and a wolf. The title is something about a rainbow."
Spacey checked the computer record. "I'm sorry. It looks like we don't stock that book."
"Yes, you do," the woman insisted. "My friend said she got it here."
Spacey searched again. And again. Using several different combinations of search terms. "I'm just not seeing anything matching that description. Could the title be something different?"
"No," the woman insisted. "I know it was that. I'll just go look for it myself." If she'd left it at that we might not be telling you this story. Not so. Ten minutes later she came back to the desk, still with no book, and insisted that Spacey search again, using the exact same search terms as before. She couldn't tell us anything else about this supposed book. Did she really think it was going to show up in ten minutes? Or that Spacey was lying to her? 

And that's why Rainbow Woman is the next murder goose victim.