" by (full name: Jagat Janani Sahni) is a fictional book within the plot of the 2014 blockbuster Bollywood film PK . In-Universe Context

Through innocent, childlike questions, the character exposes the hypocrisies and "fear-based marketing" used by self-proclaimed gurus like Tapasvi Maharaj. Themes in Jaggu’s Narrative

While the book is a central plot device, it does not exist as a physical publication by a real-world author named Jaggu Sahni.

Jagat Janani "Jaggu" Sahni is a television reporter who helps PK find his lost communication device and navigate Earth's complex religious landscape.

Below is a draft blog post written from the perspective of a film enthusiast or reviewer discussing this fictional (within the movie) book.