The most "mentioned" novels according to google search by country loading nav links
code at github

Afghanistan
Albania
Algeria
Antarctica
Australia
Austria
Botswana
Cambodia
Canada
China
Croatia
Cuba
Denmark
Egypt
Ethiopia
Finland
France
Germany
Hungary
Iceland
India
Indonesia
Ireland
Israel
Italy
Japan
Kenya
Laos
Mexico
Morocco
Netherlands
New Zealand
Nicaragua
Nigeria
Norway
Peru
Poland
Portugal
Romania
Russia
Saudi Arabia
Scotland
South Africa
Soviet
Spain
Sweden
Tanzania
Turkey
United Kingdom
United States
Vietnam
Wales
Zimbabwe