You'd have to pick the songs you want via the drop-down menu (it's "edit") and put them into the "playbook Playlist".
the playbook should be synced with a PC in order for the music to be put in a more proper file hierarchy and have your playlists to be transferred into your playbook as well.
screenshots in a bit...
btw: the list icons meant the the song is already in the playbook playlist
Edit:guess I should put more time into the post...
Actual steps:
hit "all songs" icon go get your list of songs that are stored on your tablet (assuming you just started the music app)