Printed materials can be a rich source of information about your destination culture. Knowing its history, climate, geographical location, and political views can be helpful and necessary.
Things to Keep in Mind
When was it published?
This will help you know whether you are looking at something historical or current.
Who published it?
Everyone sees the world through their own bias. Knowing the answer to this question helps you understand the possible agendas behind their work.
Key Notes on Cultural Research
It can be very helpful to make sure to read resources written by people with contrasting worldviews to your own. Remember that you are going into a foreign culture, and it may align more with their viewpoint than yours.