I don't doubt the quality or the amount of effort put into it. I do feel, that since the photos are in the public domain, that the digital scans should also be in the public domain. I don't feel like paying $200 for remastered prints when I could pay $5 for good-enough-for-me prints
The digital scans are public domain [1] though I think you have to do a little digging on NASA.gov for the raw TIFF data. It's the remastered images made by Andy Saunders that aren't in the public domain. Anyone is free to make their own remastered versions and release those into the public domain (or make a competing book/print service)
[1] https://www.flickr.com/photos/projectapolloarchive/albums
The book is huge in all 3 dimensions. Nearly every page is a full-page photo print. It is a work of art, an artifact, and well worth the price. I love my copy.