The Martinus Institute publishes three other books relating to Martinus and his work. The first is Samarbejdsstrukturen (The Structure of Cooperation), which describes the conditions that will help people cooperate in an inspiring and uplifting way within the cause’s many sphere activity. The two remaining books are Martinus’ Memoirs and Martinus as We Remember Him, both edited by Sam Zinglersen, a long-standing friend of Martinus.