Yeah, it's a great collection of instrumentals.
There is already a thread here about it started by TrueFaith77 (December 31), but the activity at this forum is very low at the moment.
My guess is that the album is done by Spencer alone, without any backing band. The music (apart from the slide guitar) sound a bit "programmed". Something you could do at home on a computer... i.e. "homebrewed".
You're right, the songs are very good and moody.