Authors who consistently publish acceptable but not bestselling books are referred to as Midlist authors.
Midlist publications were negatively affected by the US Supreme Court decision in the case Thor Power Tool Company v. Commissioner of Internal Revenue, which changed how book publishers have to account for and can depreciate unsold inventory each year. This has been somewhat mitigated by the development of online bookselling, which makes less popular titles more accessible to average readers. (For more on this phenomenon, see The Long Tail.)