Indeed. Apple does give you control over notifications, in their different forms, so just turn them off.
Having said this I have the app installed since forever and notifications turned on (useful for order status, shipping notifications etc) and never got a self-promoting notification like that. I wonder if it is a regional thing (I’m in Europe).
Its a book of proceedings of a scientific conference, usually peer-reviewed. Springer publishes the proceedings but has nothing to do with the selection of the papers or their scientific quality… its just a service they provide, for a fee.