Scott,
If you are making the query call from somewhere within the "HVTN Publications and Analyses" project, then the work Project, that starts the path to the query/table, takes the place of the actual project name that you are in. So I think you want something like this:

SELECT * FROM Project."_data/".lists."Publications"
SELECT Publications.pub_category FROM Project."_data/".lists."Publications"

-Cory