This six-session small group Bible study, With All Your Heart, by noted historian, Ray Vander Laan, is volume ten of the That the World May Know series. In this volume, Vander Laan takes you through the desert experience and into the Promised Land.

Ray Vander Laan is the founder of That the World May Know Ministries and creator of the Faith Lessons video series with Focus on the Family. An ordained minister, he holds the chair of biblical cultural studies as a religion instructor at Holland Christian Schools in Holland, Michigan. He and his wife, Esther, have four children and fifteen grandchildren.