 !973 book written by a German diplomat who, it is claimed, was extremely knowledgeable about India. There is an annual memorial lecture in his name & speakers appear to have been prominent in their own right. He states unequivocally that there was no Tamil Kshatriyas & bases this on the various war-like groups not uniting. I may have this wrong, but I didn't think that cross-caste/group unity was at the root of the kshatriya idea. However, the book is primarily about political developments and I do worry a little about relying on non-historians/sociologists/anthropologists etc. He doesn't appear to cite many other works and I could not spot a bibliography in the preview version at GBooks. GScholar shows 32 citations but they include other works by him & I have not checked the context. Conclusion - it might be a weak aid to tip the balance but I wouldn't consider it a stand-alone authoritative work on the subject of Tamils or Kshatriyas. -   