Book excerpt: Under the guiding principle of lumbung, the Indonesian collective ruangrupa is less concerned with individual works than with forms of collaborative working. As a reference work, companion, and innovative art guide, the Handbook offers orientation for these comprehensive processes; it is aimed at visitors to the Kassel exhibition as well as those interested in collective practice. All the protagonists at documenta fifteen and their work are presented by international authors who are familiar with the respective artistic practice and cultural context. Entitled "lumbung," the book introduces the mindset and cultural background of documenta fifteen illustrating the artistic work processes with numerous drawings. A chapter on Kassel presents and explains all the locations of the show, including the artists and collectives represented here.