I'm sorry, I haven't found specific reviews of this 'kala billa urdu novel' yet. You can try searching on some Urdu literature review websites or forums.
Well, to know if Kala is a real story, we need to look at the source and the evidence presented. If it's well-documented and verified, it might be real. But if there are inconsistencies or no reliable sources, it could be more fictional than real.
It depends on how you define 'based on a true story'. While it may draw some elements from real-life, it also incorporates fictional elements for dramatic effect. So, it's a blend of truth and creativity.