In this book series, Prof. Dr. Ali Arslan’s travels in 42 countries on 4 continents and the sociological observations and comments he made during these trips are described. The first 15 books describe the trips to Saudi Arabia, Azerbaijan, Iran, Pakistan, India, Japan, Malaysia, Singapore, Indonesia, Spain, Morocco, Algeria, Tunisia, Bosnia-Herzegovina and Qatar, which were held consecutively in 2 months in 2018. In the following books, his observations and comments in America, England, Germany, France, Poland, Belgium, Austria, Czechia, Bulgaria, Greece and other countries where he had previously visited on various occasions were discussed. When he went to Morocco, the country of the world-famous traveler Ibn-i Batuta, he was told with a joke, “You are the Ibn-i Batuta of Today.” Likewise, it is integrated with the memories of the famous traveler Evliya Çelebi, who is world famous and well known to Turkish readers. In this book series, written with a scientific style and sociological perspective, you will have the opportunity to examine the knowledge and comments obtained in 42 countries. The Saudi Arabia book is the first book in the series.