Spring Arbor; The official Christian Marketplace.

Spring Arbor became the official distributor for Christian books (with Christian meaning all faiths and denominations) at some point in 1970 when they bought Spring Arbor from the Christian (evangelical) Booksellers Association.

They are the only distributor that represents every aspect of Christian literature. Being approved by Spring Arbor gives a publisher access to bookstores who generally only sell Christian fiction or in this instance fiction that doesn't usually offend readers of many different faiths. There really aren't that many Christian bookstores that serve the general market of Christians though so it really doesn't do a publisher or author much good to be approved. However, it does make your books orderable through affiliated bookstores which gives you another possible route for sales should you find your work appealing to CBA's closed market of readers. ;)