Krauss is a science fiction writer. - Fishy
Actually he is a very serious physicist. Of course you have not read his book but somehow you are qualified to critique the science.
Did energy (matter) exist before the "big bang?"
No
Did location or space exist before the big bang?
No
Did time exist without space before the big bang?
No
What in the world exploded into the big bang?
There was no explosion
Did any laws or information exist before the big bang?
No
Is there some primordial substance that is the source of of the universe and everything in it?
No