Now, if you have gone through a book by Dame Agatha Christie; then you will find the stark similarity in this novel. But, Indian novelists have always used liberal(often termed as creative inspiration) western works.
Afterall, a gullible hindi reader hardly pays attention to story when he has bought it to have some vicarious pleasure.
Without mincing words, it is a very bad saga. It uses all elements of hindi movies and then package it for a specific target audience or readers.
I would humbly request all - please donot wast your inner peace and hard earned money on bad literature.