Doubt and Assurance, Edited by R.C. Sproul is a worthy read that is sure to help doubters; those who struggle with assurance of salvation.
Part one surveys the anatomy of doubt. R.C. Sproul, Alistair McGrath, W. Andrew Hoffecker, Os Guiness, Sinclair Ferguson, and R. Bruce Steward join forces and roll out six impressive chapters that are theologically driven and geared to explain the various aspects of doubt.
Part two covers assurance. Contributors include Roger Nicole, John Gerstner, Ron Kilpatrick, Steve Brown, and John Richard DeWitt. These shorts chapters include a brief theology of assurance and alert readers to this important and multifaceted biblical teaching.