Fleetwood Mac became a musical juggernaut with the release of the group's self-titled album in July of 1975 and Rumours in February of 1977, but the early years for the group included a number of solid albums that are overshadowed by the ones that followed. A new box set due September 4 will delve into those albums and include a number of bonus tracks and a 1974 studio concert. The studio albums with bonus tracks covered in the remastered recordings include The Play On (1969), Kiln House (1970), Future Games (1971), Bare Trees (1971), Penguin (1973), Mystery To Me (1973) and Heroes Are Hard To Find, and a live recording from the Record Plant in December, 1974.