The question is confusing. You need an historical event -- one that actually happened -- but it has to be a novel, which means it's fictional. So do you need an historical novel, or a non-fiction book about a holocaust?
Assuming you need a non-fiction book on the history of a holocaust, and...
You could contact any cooking school, their library would have a lot of info. You can also try asking the college libraries and customer service at any food company. Even if you get answers about only one food, it's a place to start.
You could contact any cooking school, their library would have a lot of info. You can also try asking the college libraries and customer service at any food company. Even if you get answers about only one food, it's a place to start.