From my school days I am a fan of Anondamela Pujabarshiki. This magazine contains many stories of young detectives as well as novels and stories of famous writers. When Durga Puja comes, I wait eagerly for the magazine. One of the stories, which I love to read always, is Pandob Goyenda by Sosthipodo Chatterjee.
I have been able to collect some books of Pandob Goyenda series. You can go to the link & download the books.
Enjoy & don't forget to let me know about your experience.