There's a reason why they sell travel guide books at every airport in the world. In short, people like to know about the places they are travelling to. Of course, nowadays you can simply consult the internet. Online travel sites are visited by millions of people each day.
Does this mean that you should not buy a travel book at the airport? No, of course not. After all, you won't have access to a computer when you are walking the streets of Paris or Rome and you want to know where to eat or which museum to see. So, while it is possible to plan most of your vacation with the help of the internet, it is best to have a travel guide handy when things don't run according to schedule, and they seldom do.
What will they tell you? While there are general travel guides, most of them focus on one particular aspect of the trip. The three most common types of guides books are adventure, cultural and recreational travel guides.
Adventure guide books focus on popular travel destinations for more active tourists. Perhaps you want to ride dune buggies in the Sahara Desert or go scuba diving in Australia. These are the guide books you will want to purchase for you next adventure holiday.
Cultural guide books are easily the most popular reference book for tourists. These travel guides can tell you where all of the popular museums, churches and monuments are in any city in the world.
Recreational travel books are probably the least popular of the lot. They are for tourists who simply want to lie back and relax. In them, guests will find reviews or beaches and spas and other leisure activities.