Hellboy in Hell began in December 2012 picking up where Hellboy: The Fury left off. Unlike the previous series, Hellboy in Hell is an ongoing series. The first four issues came out monthly as a part of a single arc, but going forward the series will have a sporadic release date with many arcs only being a single issue in length. Multiple-issue arcs will come out on a monthly schedule though.
Hellboy in Hell also marks the return of Mike Mignola as the ongoing artist for the character. At this point the plan is for him to write and draw all Hellboy in Hell stories himself.
Hellboy in Hell is an ongoing series with a clear numbering on its covers. It does not continue the internal numbering of its parent series.
Hellboy in Hell is collected as its own line of trades.
- see also Hellboy Library Editions
It is unknown whether Hellboy in Hell will be collected in library editions, but it seems very unlikely that they wouldn't.