Mark Gregston is an author, speaker and co-founder of Heartlight Ministries, a residential counseling center for teens and families in crisis. He is the host of the nationally syndicated radio program, Parenting Today’s Teens with Mark Gregston. He has written eighteen books on the topic of parenting, many of which deal with struggling teens. He also publishes a weekly parenting newsletter that has a readership of over 500,000. Mark and his wife, Jan, reside in Hallsville, Texas, and have two children and four grandchildren.