Similar Material km 11/77 pp. 1-2 Be Joyful Workers Joy—A Quality We Acquire From God The Watchtower Announcing Jehovah’s Kingdom (Study)—2018 Joy—A Quality We Acquire From God The Watchtower Announcing Jehovah’s Kingdom (Simplified)—2018 Serve Jehovah With a Joyful Heart The Watchtower Announcing Jehovah’s Kingdom—1982 Serve Jehovah With Joy of Heart The Watchtower Announcing Jehovah’s Kingdom—1995 Joy Aid to Bible Understanding Presenting the Good News—In a Way That Brings Personal Joy Our Kingdom Ministry—1984 Joy Insight on the Scriptures, Volume 2 Presenting the Good News—With Joy Our Kingdom Ministry—1988 Finding Joy in a Trouble-Filled World The Watchtower Announcing Jehovah’s Kingdom—1985 Share in the Joy of Giving! The Watchtower Announcing Jehovah’s Kingdom—2001