Not all books have been tagged by country or topic. The range of subjects covered in the books is extremely broad, while the number of topics used in the database is increasing gradually and always remains limited.
If you cannot find the topic you are interested in among the filters, you can use the search function.
A book is assigned a country/topic tag if at least one chapter in the book is devoted to that country/topic.
If a book has not been tagged with some country/ topic, this does not necessarily mean that this country/topic is not addressed in the book.
If a book has been tagged with a country/topic, this does not mean that the book is entirely or even in a substantial part devoted to that country/topic.
A book is assigned a region tag if a chapter in the book or the entire book is devoted to the region as a whole or at least one country in that region.
If a book has been assigned a region tag, this does not necessarily mean that the entire book is devoted to that region.