Yeah, it's not clear. The following explanation goes into a bit more detail on finding what you want to download, for anyone else who has trouble identifying books in the torrent.
Try browsing through this link on the publisher's site for any subjects or books you'd be interested in. If you find something, copy the ISBN (listed in the work's direct URL, or you can open the work's page, which lists out the eBook and hardcover ISBNs---you need the eBook ISBN as far as I understand). If you open the torrent and let the file contents load, depending on your client, you can look through the structure, search through all files using the ISBN, and locate the book that way. Files all seem to be named by their DOI, with the / replaced with _. I guess the ISBN is part of the DOI naming convention.
It doesn't look like any work tagged as Ahead of Publication will be in this torrent, but works from 2023 and prior appear to be.