They have released a couple of hundred art books for viewing and/or free download.
Article:
https://www.timeout.com/newyork/new...art-books-from-the-guggenheim-for-free-042920
Archive.
https://archive.org/details/guggenheimmuseum
Article:
https://www.timeout.com/newyork/new...art-books-from-the-guggenheim-for-free-042920
Archive.
https://archive.org/details/guggenheimmuseum