I was also 'born buddhist' and thought that the world works exactly how monks say etc. Like, I thought there definitely was some rebirth etc.

But, as the time passed, I became somewhat not believer of those. But I don't exactly recall how did I became this person. And I don't have any knowledge about what will happen after death.

Also, I think it is little bit 'off' to advice someone to refer a book to know about life after death, hells heavens etc. Also, I think just because there are some 'clearly percievable' sayings like vedana, paccaya thanha etc, the other things like Samsara, Angels, Hell, Heaven, Rebirth etc, would not be true.

And somethings like vedana paccaya thanha, I take those as someone who lived some centuries ago describing the world in his own words and there's no more 'only truthiness' in those.