Sometimes the best sermon preparation and study is by way of indirect reading, and this is definitely how I'm preparing sermons this week. I've been immersing myself in T.F. Torrance's Atonement: The Person and Work of Christ. It's a big thick book, but well worth the time spent reading it. Anyone praching through the Triduum will, whether they know it or not, tend towards some version of the doctrine of atonement or another, and it is good as we preach to be a bit more clear about what we are doing, what aspects we are emphasizing, etc. There is no clearer guide to this than Torrance.
For those not interested in buying his book or reading an entire volume, you can dip a bit into his theology and biography by visiting http://www.tftorrance.org/journal.php
Blessings to all as we meditate on the mystery of the person and work of Christ this Holy Week.