LibraryThing Early Reviewers is a free program for LibraryThing members to read new and forthcoming books. Strong Songs of the Dead is going to be a featured book in their next offering.
If you are a member of the website, you can find out how to participate here:
https://www.librarything.com/ner/howitworks
There are only 30 copies of the book and sometimes hundreds of people request copies, and they generally are given to people who have posted reviews on the website before.
Find the giveaway here:
https://www.librarything.com/ner/detail/50209/Strong-Songs-of-the-Dead-The-Pagan-Rites-of-Sacred-Harp