Renting just books is unlikely, although there's no reason why if that were a frequent request. Definitely, having rain boots to visit Uyuni is a good idea if during the rainy season. Although personally I went during that season, that year they were experiencing a drought, so it was quite dry! Buying daily items in Bolivia is very cheap, so it is possible ...
Have entered Bolivia twice by bus from Chile, and left once by bus (to Peru).
Every time at the border (once it opened), every single passenger was required to disembark and go through immigration.
One possible reason is that they have rest breaks and multiple stops as well, meaning if you were trying to 'sneak' into Bolivia, you'd have a chance. ...
Probably not near those two cities. This is a highland grazing area, I am thinking nearer to the Altiplano. I am hoping someone would recognize the shape of that mountain, which looks a bit like Illimani near La Paz, Bolivia.
Amazonas used to be the airline that did this. However, their route map now shows this is no longer the case. Flight searches on search engines all seem to support this - you have to hop via say, Cochabamba or La Paz.
This is thin ice for an Answer, but I'll bet the reality is:
a) The Bolivian government issued this form to be completed by those entering the country;
b) The Bolivian government makes airlines distribute the forms to incoming passengers; and
c) Sometimes, maybe even most of the time, a Bolivian officer will demand the completed form on arrival.
From this source, we see:
A Tambo in the Mountains at a Height of 16,000 Feet, Andes Mountains, 1849. Attributed to Robert H. Vance (1825–1876).
So the mountains are the Andes Mountains. Don't know how helpful this is for the location of the image, though. You see for yourself!
I called the Embassy of Bolivia in Sao Paulo and they confirmed getting a Bolivian visa would take around 24 hours if all the documents are the documents are provided and the process goes well.
However, due to the conflicts in Bolivia I decided not to go.