They're not religious we're not religious believers, but we do believe in the spirit world.' I just remember very interested in it since I was a teenager, seeing a lot of horror movies, which I still do.' Poulsen has also called the album a 'spiritual album, because the lyrics are very spiritual. Also dark, spiritual things… I guess it's just something that a lot of guys in the metal and rock scene are very into. There's definitely some cool characters and some voodoo stuff on this record, which I always found fascinating.' Lead singer Michael Poulsen stated that he believes in the spirit world, saying: 'I've always been very interested in the spiritual world and all those kinds of things. You know, the last album was leaning heavily towards like the Western stuff and, you know, outlaws and cowboys and that kind of thing, and this is a whole different thing. Lead guitarist Rob Caggiano said of the musical content of the album: 'There's definitely some stuff that kind of weaves in and out of the record. On 7 April 2016 Volbeat announced the release of Seal the Deal & Let's Boogie. Larsen had known Michael Poulsen and drummer Jon Larsen since the early 1990s, and replaced Anders Kjølholm on Volbeat's first European tour in 2006. Kaspar Boye Larsen was announced as the replacement for Kjølholm in May 2016, after having played bass for Volbeat on their recent US tour.

According to Poulsen the band sat down and talked about the coming year and 'there were some things that we couldn't agree on', adding 'there was no big drama'. In November 2015 it was reported that bassist Anders Kjølholm had left the band. In April 2015, singer Michael Poulsen revealed that he had so far written seven songs for the album.

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