Long tail. I feel like I remember hearing that in 2003, Where Blood and Fire Bring Rest was still selling around 200 copies a week, five year after release. That's around 100,000 a year, and if it's selling that five years after release, that's pretty good. Plus, Billboard charts were notoriously inaccurate for Christian bookstore sales in the late 90's, early 2000s time frame, which is where a lot of Solid State distribution was.