Books are information, not evidence. Darwin's book is not evidence of evolution, that's in the Earth, found by archeologists digging into it, displayed at museums the world over. Beethoven's scores aren't music, that's in concert halls, performed by talented, trained musicians. Should one travel to those places, enlightenment and beauty will be the reward.
Johnathan Swift doesn't tell us just where to look for the island inhabited by miniature humans. Stan Lee is tight lipped as to Peter Parker's address, thwarting our discovering the truth.
Each time we assemble a round of ammunition we conduct an experiment. If we do everything correctly, we either prove or disprove.
Some books, like Gulliver's Travels, Spiderman, and others, do not allow for experiment or say where to travel so that we might see the evidence for ourselves. The reason we can trust published data is based in evidence.
If the cookie recipe calls for butter and eggs and not for ground glass and rodent droppings, it may be worth a bake. Faith is a waste, trust reason.