Similar Material it-1 “Harpoon” Harpoon Aid to Bible Understanding Crocodile Insight on the Scriptures, Volume 1 Behemoth and Leviathan—Creative Marvels The Watchtower Announcing Jehovah’s Kingdom—1963 Crocodile Aid to Bible Understanding Leviathan Aid to Bible Understanding Beware of the ‘Eyes of the River’! Awake!—1996 Leviathan Insight on the Scriptures, Volume 2 Meet Mighty Leviathan Awake!—1976 Questions From Readers The Watchtower Announcing Jehovah’s Kingdom—1986 A Closer Look at the Crocodile Awake!—1995