This book gives a Biblical perspective on separation, discerning betweeen truth and error, and the Christian's responsiblity to follow Christ in these areas.
Excelent book that help us to understand the Biblical principles behind the teachings of biblical Separation, has a great review of the history of liberalism.
Read it in college because i had to. Been a long time, so really too long to review, but if memory serves right, it's typical fundamentalist line-drawing.