The set covers a five-year timeframe that encompasses several different band lineups, from founding members Fleetwood, Green, McVie and Spencer; to later additions like Danny Kirwan, Christine McVie, Dave Walker, Bob Welch, and Bob Weston. The collection includes seven studio albums: Then Play On (1969), Kiln House (1970), Future Games (1971), Bare Trees (1972), Penguin (1973), Mystery To Me (1973), and Heroes Are Hard To Find (1974). Those records fueled Fleetwood Mac's early popularity in the U.K. and propelled them into the Top Ten with singles like "Man Of The World," "Oh Well – Pt. 1," "The Green Manalishi (With The Two Prong Crown)," and the #1 hit "Albatross."