For a safe and meaningful trip, it is necessary to plan in advance essential issues so that there are no problems during the trip. It is ideal for travelers to hire a travel agency if possible so that there is greater security in relation to the tours, the hotel and the locations you plan to visit.
It is also necessary to research about the place, about the safest places for tourists, hire only known services and be careful with personal belongings.
I mean the encyclopedia is 40 years old, and it cant be factual or reliable because she failed it. It never said anything about it being valuable so theres your answer. (I also knew the word beforehand but theres some sort of explanation)