Intervention is a series of Christian mystery/suspense novels by American author Terri Blackstock. As one can divulge from the title, the series deals with drug abuse (of teenagers, in particular).


Terri Blackstock is an American author who writes romance novels and mystery/suspense novels for the Christian market, which she’s been writing for ever since she had a spiritual awakening. Blackstock gained fame when she co-authored the Seasons series with Christian activist Beverly LaHaye. Blackstock has also written under the pen names Terri Herrington and Tracy […]