Kakababu

Raja Roy Chowdhury, mostly known by his nickname, Kakababu, is a fictional adventurer character created by Bengali author Sunil Gangopadhyay, that has attained legendary stature in Indian, particularly, Bengali literature. The series, falling under the adventure genre of literature, targeted at children and teenagers, started in the autumn of 1979 with the publication of "Bhoyonkor Sundor" in Anandamela magazine, puja number. Since then, the series continued for 33 years on popular demand, with over 36 adventure novels in print until the death of the author in 2012. He has 6 parts of books containing 36 stories.The publishers of most of Kakababu adventure books are Ananda Publishers, based in Kolkata, India. He is inspired by Premendra Mitra's Mamababu.
In other media.
Film.
The first three films in the list are the "Kakababu Original film series". The later are Shree Venkatesh's film series. 
Television.
Animated series.
In October 2010 an animated series by the name of "Kakababu-Sontu" began airing in Ruposhi Bangla.
Telefilm.
•"Rajbarir Rahashya" 
•"Kolkatar Jongoley"
•"Sinduk Rahashya"