Thanks to Moritz Beitelschmidt we’ve been able to find (and make available here) the second volume of Bogdanov’s Tektology translated into German (Volume 1 in 1926, Volume 2 in 1928).
A. Bogdanow, Allgemeine Organisationslehre: Tektologie – Band 1 (1926)
A. Bogdanow, Allgemeine Organisationslehre: Tektologie – Band 2 (1928)
Alexander Bogdanov Library 