These kind of stories I did read over Suktara or other Bengali books. A story of good spirit helping people who can help him to take revenge!
Talaash is also of similar genre. It was a let down for many people as it was touted and promoted as a psychological thriller, but ultimately it turns to be a story about spirits living in our world.
Talaash has a very gripping storyline and I liked it. Being a ghost film it was presented with some thriller elements. But it is not a Zindagi Na Milegi Dobara, whose screenplay and story written by Reema Kagti who did her directorial debut with critically acclaimed Honeymoon Travels Pvt. Ltd.
Probably that's why even Aamir Khan did not promote it in a vigorous way like he did for 3 Idiots.
Talaash bought out some best acting from Rani Mukerji, Kareena Kapoor, Nawazuddin Siddiqui and it delivers quite good music by Ram Sampat.
In total it's a 7/10 movie for me.
** I purposefully posted this post a bit late, so that most people watched this film with suspense, as it contains spoilers.