Dr. John Jefferson Davis is a Professor at Gordon Conwell Theological Seminary and teaches classes in Systematic Theology and Ethics.  I read his book Evangelical Ethics when I took his Christian Ethics class.

Overall, this is a well written book.  I read the 2nd Edition which I felt was a little dated, but I understand there is now a 3rd Edition available.

Dr. Davis confronts a number of key issues which the Christian community and society at large are struggling to understand.  Particularly, the following issues are discussed (among others):

1.  The Church's role in public policy
2.  Homosexuality
3.  Abortion
4.  Stem cell research
5.  Death penalty
6.  Reproduction ethics
7.  Divorce and Remarriage
8.  Environmental ethics

The book provides a good survey of the conservative evangelical positions regarding the above topics.  Fortunately, Dr. Davis carefully develops these positions using sound logic and Biblical materials.

I have used several chapters as reference materials for helping people dealing with some of the above issues.

I recommend this book to Christians in general.  Although it may not necessarily change your views, it may help you think through why you hold the opinions that you do.