Glass Hammer plays Progressive Rock in the style of bands such as Yes and ELP. The musicianship is outstanding, featuring lots of extended soloing and particularly distinctive organ and guitar work. The songs sung in a dramatic high tenor, have an epic sweep to them.
More particularly, they have two distinct Middle-Earth-themed albums,
Journey of the Dunadan, and
The Middle-Earth Album. The latter is a favorite of mine, since it was recorded as if the band had somehow taken all their acoustic instruments (and some ethereal elf-music sounds) to Bree and performed a set for the patrons of the Prancing Pony -- complete with live small-audience sounds. (A between-song background argument between two audience members over a plate of taters is quite amusing.) The cover art alone is is almost worth the price of the album.
These albums are for sale on the Glass Hammer store site,
here about halfway down the page. They also have a couple of C. S. Lewis-themed albums.