The Feluda series is probably my favourite detective series of all time. The stories themselves are pretty good, but what makes these stories so great are the characters and the locales.

The iconic trio of Feluda, Topshe and Lalmohan Babu will forever be remembered. The stories make you travel all over India and the locations are so perfectly described to make you feel as if you are there.

I have only read the English translation so I can't speak for the original, but the translator has done a pretty good job. 
Obviously, the writing is simple, (the stories are literally made for kids!) but it's great. 

Something else that's great is Mr. Ray's ability to write so many entertaining detective stories while keeping them family-friendly. 

So, as you have probably already understood from the rest of this review, I absolutely adore Feluda and would recommend you give this and Volume 2 a try.