
These odd occurrences climaxed when Birch was involved in a car accident with a mini-bus transporting a group of nuns, after which he was presented with a repair bill for £666. Music press reports told stories of unexplained phenomena occurring during the sessions at Battery Studios, such as lights turning on and off of their own accord and the recording gear mysteriously breaking down. With "Invaders" being a re-write of an earlier song, "Invasion", this suggests only two tracks – the title track and "Gangland" – were written after the 1981 tour ended. However, live recordings show that five of the album's songs had been premiered live already at a few shows towards the end of the Killer World Tour in November and December 1981. This was allegedly because the group were for the first time creating a new album from scratch, with very little material written prior to the record's pre-production stage. The recording and mixing of the album had to be completed in only five weeks, after the band had spent too long constructing the new songs.

Owing to his previous band Samson's ongoing contractual issues, Dickinson could not legally have any writing credit. When Bruce joined, it opened up the possibilities for the new album tremendously." Īccording to several interviews Dickinson was heavily involved in writing several of the album's songs, and in particular the tracks "Children of the Damned", "The Prisoner" and " Run to the Hills". The album's producer Martin Birch remarked, "I simply didn't think was capable of handling lead vocals on some of the quite complicated directions I knew Steve wanted to explore . In addition, the release saw Steve Harris adopt a different approach to writing, which would cater more for new vocalist Bruce Dickinson. The Number of the Beast is Iron Maiden's only album to include songwriting credits for Clive Burr, and was the band's first album to feature writing by guitarist Adrian Smith.

The Number of the Beast was met with critical and commercial success, and became the band's first album to top the UK Albums Chart and reach the top 40 of the US Billboard 200. The album was their first to feature vocalist Bruce Dickinson and their last with drummer Clive Burr.

It was released on 22 March 1982 in the United Kingdom by EMI Records and in the United States by Harvest and Capitol Records. The Number of the Beast is the third studio album by English heavy metal band Iron Maiden.
