The song was largely written by long-time guitarist Dave Murray. The lyrics were inspired by vocalist Bruce Dickinson's comment that the intro riff made him think of raindrops. The song has no connection with the 1995 novel written by John Grisham of the same name.
The guitar solo in "Rainmaker" is played by Dave Murray.
The cover is a still taken from the music video directed by Howard Greenhalgh. This single also contains a double-sided poster.
"More Tea Vicar" is a recording of a jam session (similar to "Pass the Jam") with Bruce Dickinson trying his hand at rapping.
^"Rainmaker" Picture Disc Single (Media notes). Iron Maiden. EMI. 24 November 2003.{{cite AV media notes}}: CS1 maint: others in cite AV media (notes) (link)