Where's the scam? No one is forced or even tricked into sending them artwork. As you say, the museum and project are legitimate. Did they contact you or did you reach out to them to get the ball rolling? Do they live up to their end of the bargain/contract? Is
there a contract? Were you promised something they did not deliver? Here's an art blogger who feels the deal is
, at the very least, fair and above-board.
Now, the book thing has long been a way for many businesses to make money. Artists of all ilks - painters, sculptors, writers, etc. - and just the curious, have long been the target market for easy-to-print books sales. I bought one 30 years ago that purported to tell me about my family tree. It included publicly available information on people with the same last name as mine. There was nothing in it I didn't already know about my family, but the specifics took up about a dozen pages out of 60 - the rest was general information about genealogy. I felt I overpaid when the book arrived, but it made me want to find out the missing information, and I've been doing genealogical research ever since. I still feel the price was too much, but I don't feel cheated.
Not caring for how any museum conducts business, the quality of a product, or even how a blog is advertised, does not make any of them a scam - only that one or more people don't care for the package. And, please, keep in mind that making claims, without verifiable evidence, that any business or individual is a scam can open a person, as well as the platform used to make the claim, up to legal action for defamation and/or libel.