Gujarat No Itihas World Inbox PDF. If you are looking for a history book for the upcoming competitive exams, you can go for this book by World Inbox. world inbox history book pdf has 216 pages and it is written by Jadeja Juvansinh and Bhavin Radadiya. It has been properly divided into different units for easy understanding and revisions of every topic. also includes tables and more that will help you in quickly memorizing the text.