Will look into it and report my findings
You say that the book goes into how asking what was before the big bang doesn't make sense, but does it ever go into
why exploring such an area doesn't make sense? It makes perfect sense to me. By exploring what was before and how the Universe came to be, we could even be answering the meaning of life as this could lead onto 'when will it all end?' and 'when it ends, will it 'restart' again?' Or have you just abstracted it incorrectly and I've misunderstood?
The stuff sparks my curiosity but I'm not particularly obsessed with it, so might take a while xD
And to your question, what I was sort of getting at is that God might exist
because the Universe exists.