Why would God write a book of lies and why would you worship such a being?

I have seen a few Christians claim that many of what appears to be historical documents in the bible, actually did not occur at all. If the bible is book that is littered with stories that are pure fiction but that are conveyed in such a way to appear as legitimate, why would you trust anything else that it had to say? If you say some of it is true, is it only because it already agrees with you have decided for yourself to be true?