Which is the scariest Lois Duncan?

My friend Susann has now got me totally hooked on the weekly book review of Jezebel - which this week vividly captures A Gift of Magic, which I think was the first Lois Duncan I read (from, naturally, the John Ward School library) and really is an amazing work. I was torn between laughter and amazement that this reviewer, Lizzie Skurnick, got the book so right. Well, sometimes these Yalies have something to offer the rest of us....