When I add the Steve Berry book with the identifiers in the log, and enabled just the Google and Amazon source enabled, I get:
Which is what I expect.
When I go to the metadata download options and unselect all the fields, I get:
Which sounds like what you are describing. So, check the configuration. You can do this before starting the metadata download by pressing the "Configure download" button. Make sure some fields are selected in both the main section and for the sources you use and try again.