I know that many conservative Christians believe that the Bible tells one big saving story and work hard to harmonize all its smaller stories and its testimonies. I think a harmonized Bible does not do justice to what it has to offer.
The Hebrew Bible tells the story of Israel and her relationship with God. The story unfolds from the beginning of creation, illustrating the eternal divine plan of election and formation. The first five books, the Torah, were traditionally believed to have been written by Moses and pre-date the prophets and writings.