Frontman Randy Blythe previously confirmed the follow-up to 2012's Resolution would be issued in 2015, around the same time he publishes Dark Days: My Tribulation And Trials - due July 10 via Da Capo Press - a book about his Czech manslaughter ordeal.

The documentary As The Palaces Burn was released on DVD last autumn. It reveals Blythe's process through the Czech legal system and the way in which the death of fan Daniel Nosek affected the band, colleagues and friends.

Regarding work on Lamb Of God's 8th album, Adler tells SiriusXM's Liquid Metal: "It's great. I guess the thing that I was overwhelmed with was the idea of us taking the year off of 2014 and then have us come together basically around now and start putting things together.

"But, as usual, everybody is a little antsy and wanting to jam, and it wasn't, like, 'Oh, hey, Willie has an idea and Mark has this kinda cool solo thing he wants to add on top of it.' Both of these guys came in with about 50 different song ideas.