This book is worth it alone for the footnotes and references for further study. It is a resource every pastor and student of the Bible should have on his shelf.
The Bible requires us to make a distinction between covenant and election. This is the only way to account for covenant breaking and apostasy in Scripture, and it provides a consistent paradigm for the practice of infant baptism.
God explicitly forbade His people in the Old Testament from marrying Canaanites because they worshiped false gods, a practice that Yahweh knew would lead Israel astray.