Here is a review of The German Gita: Hermeneutics and discipline in the German reception of Indian thought; via PTDR. The reviewer, while considering the book an outstanding achievement, points out some serious mistakes and flaws too:
Bradley Herling’s The German Gita is an outstanding achievement, charting the reception of the Bhagavad Gita in the late 18th and early 19th centuries in Germany with rich detail. This was a period of increasing interest in (and knowledge of) Asian culture. In this book, Herling explains in rich detail the legacy of the Gita’s reception in German thought.
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Indeed, the main surprise with the German Gita is clearly its exclusion of Arthur Schopenhauer, who surely deserves great credit for his interest in Indian philosophy and his consideration of it in his own work. Herling’s rationale for omitting Schopenhauer is hardly satisfactory: ‘ his contributions come after my historical purview’ (ix). This is a serious mistake. Schopenhauer rather famously (and alone of all major Western philosophers to my knowledge) had the Gita, rather than the Bible, on his bedside table and would read from it most nights. His interest in the Gita (which he took to characterize the Indian mind) clearly influenced many who came after him, not least Friedrich Nietzsche, and he was a far greater influence in maintaining and preserving the reception of Indian philosophy in German thought than perhaps any other figure (perhaps even Hegel).
Take a look!