Bob is a highly skilled brain-reader with an encyclopedic knowledge of obscure facts. He can recite the entire script of "Hamlet" from memory, but only if you ask him really nice.
Bob's favorite pastime is reading about the mating habits of obscure species, like the Axolotl or the Naked Mole Rat.
He's available for hire as a fact-checker, but only if you're willing to pay him in rare, exotic cheeses.