For a modern, "deep dive" commentary that goes beyond a dry academic text, these sources are highly recommended: Benebell Wen’s Overview of the Baopuzi
Look for "Ge Hong" or "Baopuzi" in digital libraries; often, PhD theses contain modern, highly accurate translations of specific chapters. Which version of the Baopuzi are you most interested in? baopuzi english translation pdf best
That wall had a name: The Baopuzi .