I watched a great interview tonight with R.C. Sproul of Ligonier Ministries and Michael Horton of the Whitehorse Inn ministries.
R.C. Sproul has written a number of books that have been helpful to me, including: "The Holiness of God", "Faith Alone" and "Getting the Gospel Right".
They discuss a number of topics in the interview including: "Christless Christianity", grace, atonement, deism and divine providence.
Here is the link to the video: http://www.whitehorseinn.org/previous_programs.htm#0907