The Lord God created man, created this book (Old Testament + Revelation) also that people knew and recognized him. This book is prophetic, rather than historical, which has written Lord God, during the creation of world, their own hands, (because he can do it, because he created man) latest book of Revelation (New Testament in fact fictitious) because the Bible, Old Testament, Consist of different sorts of books (more than 1000 chapters and 43 headline).