Use a Tag to cast a playlist to Google Home

Hi all,

currently im trying to use a tag reader like adonno´s to start streaming local content to a Google Nest Audio / or Hub.
I put the files in the www-Folder and i´m able to cast them to Google Home. But how is it possible to cast a playlist to Google Home? Or the folder?
Example: The audiobooks which my childs hear the most, contains of a lot of files. Is it possible to cast the complete folder?