When she announced 1989 a few months prior to its October 2014 release, Taylor Swift called her sixth record her first "documented, official" pop album, explicitly severing herself from her country roots.
A summation of everything the group had learned on their first three albums. It presents a similar combination of prog epics, heavy rockers, and songs that combine both elements, but everything is raised to a new level of inspiration and polish.
These collaborations between the core Wolf Eyes crew and friends was originally self-released as a series of super-limited 7" hand painted box sets, but now the core 'hits' have been compiled by Disciples for wider consumption.