Just click on the image to be taken to their myspace page, scroll down to find the download offer :-)
If you're have any trouble with myspace try using this direct link to the subscription page of the newsletter which once completed gives the link for the free tracks : http://johnbutlertrio.us1.list-manage.com/subscribe?u=f6eb3552c3dcb8ebdc4bb582d&id=8a5b636f07
