Consider asking him what his issues are with the Bible. Remind him that the Bible makes a number of claims about itself, that it is true, etc., and he is the one saying it isn't. Put the onus (gently) on him to prove why the Bible cannot be trusted as a book. Talk about the huge number of Greek manuscripts available, and how we have far more evidence for the Hew Testament's veracity that we have for any other ancient document.
Consider asking him what his issues are with the Bible. Remind him that the Bible makes a number of claims about itself, that it is true, etc., and he is the one saying it isn't. Put the onus (gently) on him to prove why the Bible cannot be trusted as a book. Talk about the huge number of Greek manuscripts available, and how we have far more evidence for the Hew Testament's veracity that we have for any other ancient document.