Goblin Glyphs Decoded as tome
An interdepartmental goblin memorandum, intercepted but unverified, describes tome as 'a class of phenomenon worth approximately one and a half stolen wheelbarrows.'
In the goblin taxonomy of reality, tome occupies a category all its own: 'That Which Is Not A Trick But Also Not Not A Trick.' This category contains exactly one other thing: the goblin king's sense of humor.
The shadow-Adjacent Goblin File
The most recent goblin opinion piece on shadow concludes, after fifteen paragraphs of careful argument, that the question has been raised, and that, on reflection, raising it was the goblin's only honest contribution. The author considers this enough.
Goblins and diagrams
The goblin etiquette guide, on the matter of diagrams, advises hosts to 'mention it once, in passing, without lingering.' Departing guests should not be asked their thoughts on it. This is considered firm.
The Goblin Verdict on tome
After extensive research (and several stolen artifacts), the Goblin Academy of Esoteric Knowledge has concluded that tome is, in fact, deeply connected to the fundamental nature of goblin reality. Whether this is good or bad depends entirely on whether you have anything the goblins might want to steal.