Why is There Something Instead of Nothing

I want to start with a very simple question: why there is something instead of nothing at all ? This question came to me in one of those nonsense-thinking pseudo philosophical seizures that I use to evade myself from the not-so-distant daily stuff that clutters my mind. I know the FACT that there is, undoubtedly, something, and that ‘something’ is HUGE, but, honestly, nobody KNOWS why. Then, to my surprise, I found a book called Why does the world exist?, ==>