High Quality Content by WIKIPEDIA articles! Seventh Son of a Seventh Son is the seventh studio album by British heavy metal band Iron Maiden, released in 1988 by EMI in Europe and its sister label Capitol Records in the US (it was re-released by Sanctuary/Columbia Records in the US in 2002). It is the first Iron Maiden release to feature keyboards (played by Michael Kenney) and, along with The Number of the Beast and, later, Fear of the Dark and The Final Frontier, debuted at No. 1 in the UK charts. It also marks the first appearance of many progressive rock elements, particularly seen in the length and odd-time signatures of the title track "Seventh Son of a Seventh Son," and by the fact that it is a concept album.