YHWH Exists is a very profound study, which covers an incredible range of topics related to the Biblical History of ancient Israel. I recommend especially the part dealing with the chronology of Biblical Israel and particularly so that of the time of the Sojourn and the Exodus. One may disagree about a small number of years here and there, but Jodell Onstott has presented a vast amount of data, which undoubtedly show that the late date currently held by most scholars is truly untenable. This is also supported by a fair amount of archaeological evidence. To cut things short: this is a great and recommendable study!