Based on her other books, you read the story format and learn basics, and then do Internet research. If I am correct, there wouldn’t be a lot in the answer key because of the individual research. I wouldn’t let a lack of full answer key deter you though. There is a lot to be learned from researching a particular herb, etc. There should be a sample on Queens website.
I agree that this is exciting to see an alternative health curriculum. I would buy it if funds weren’t so short. My kiddos will take my homemade alternative health class instead.