Think twice, Markus - under guidance by the linked book.
Things might not be what they look like. In the end, Big Bang is just a theory, made - like every theory - by best possible use of known facts at a given time. Possible that one day we put Big Bang into relation to a bigger context, as comologists today already do, or replace it completely with a then better fitting theory.
Scientific theories are never-ending construction sites. That is no criticism, nor pessimism - but the essence of the scientific process. No absolutes, no penultimate truths.