Fortunate thing he hadn't actually opened or taken anything. He's been chased by warehouse management hardware before, even if it was awhile ago, and feels no pressing need to repeat that particular experience.

He has been scanning, though, and whirls about when Book addresses him, all smiles.

"...oh! Ah, yes, hello! Nothing to put back, just..."--he glances at the sonic screwdriver in his hand, tosses it up, catches it, and drops it casually in his pocket--"...checking up on your cataloging. Regional supply catalog checker-upper, just dropped by, surprise inspection."

With his other hand, he whips out a black wallet sort of deal, flashing what (in all probability) certainly looks like regional supply catalog management credentials, whatever exactly a region supply catalog manager is supposed to be.

"And you are...?"