[citation needed] Klaeber retired from Minnesota in 1931 and returned to Berlin, where he continued to work on what would become the 1936 third edition of Beowulf and the Fight at Finnsburg.
During this time, because he no longer had his library and paper was scarce (Bad Kösen was in the Soviet occupation zone), he depended greatly on colleagues and friends in the US.
Toward the end of his life, Klaeber was bedridden, impoverished, and partially paralyzed but continued his scholarly work nevertheless.
[citation needed] All of Klaeber's editions have included a substantial Introduction, discussing a range of different topics related to the poem, and a comprehensive Commentary section on particular aspects of the text, as well as an extensive glossary.
In 2008, a new version prepared by an editorial team consisting of Robert Dennis Fulk, Robert E. Bjork, and John D. Niles was published as the "fourth edition"; it retains much of Klaeber's third edition design and text, but also substantial alterations intended to update the work by taking into account scholarship on Beowulf published since 1950.