A probably-comprehensive list of NEA Big Read books. The year listed is the first year the book was added to a Big Read list and may not be entirely accurate. I took the information from various NEA press releases, but there are no press releases listed before 2016, they don't give a full list of the annual books, and there doesn't appear to be any press release at all for 2018-19.

Book lists here: https://www.arts.gov/initiatives/nea-big-read and https://www.arts.gov/initiatives/nea-big-read/archive