Dr. Rick Thomas has written a great resource for biblical counselors called: Tough Issues Straight Answers.
He covers 40 subjects that are tough issues that all biblical counselors will face and he uses the Scriptures to bring forth the answers! He writes in a down-to-earth, conversational manner. If you ever get a chance to hear him teach, he is an excellent, energetic teacher as well.
I recommend you read this book and have it on hand to use as research when you are facing some of these challenging issues.
-Mark (grateful to Dr. Thomas for providing us with an excellent resource like this one!)