The three volume set, Holy Scripture: The Ground and Pillar of Our Faith, by David T. King and William Webster, was recommended to me as a good comprehensive resource on the doctrine of sola scriptura. The best price I found for the set was at aomin.org I'm hoping to get the set soon, maybe as a birthday present :)
Here is the description of the set on the store page:
The first volume by David King, a PCA minister and long time student of the sufficiency of Scripture, presents a biblical defense of sola scriptura. King interacts with the wide range of Roman claims concerning the nature of Scripture and the alleged need of an infallible interpreter. Included is a full and devastating critique of Not By Scripture Alone, edited by Robert Sungenis.
In the second volume of this series, author William Webster tackles the historical issues inherent in the debate over sola scriptura, including the ever-present battle over the canon of Scripture.
The third in this series comprises a 312-page compendium of patristic citations affirming the Reformation doctrine of sola scriptura. Every person who has gotten tired of seeing the same old out-of-context citations batted around on EWTN or in This Rock magazine will find this volume invaluable, as it contains a most thorough listing of relevant citations, some of which have never appeared in English before this edition. A must for all who are interested in this vital area.