A God Strolling in the Cool of the Evening by 
Complete Chronicles of Narnia by 
Gilead by 
Left Behind by 
My Hands Came Away Red by 
No Higher Calling by 
The Innocence of Father Brown by 
The Testament of Mary by O'Connor, Flannery PS 3565 .C57
Lewis, C.S. (Clive Staples) PR 6023 .E926 (for adult fiction) and PZ 7 .L58474 (for young adult fiction)
Chesterton, G.K. PR 4453 .C4
Tolkein, J.R.R. PR 6039 .O32
Karon, Jan PS 3561 .A678
LaHaye, Tim PS 3562 .A315
Robinson, Marilynne PS 3568 .O3125
Girzone, Joseph PS 3557 .I77
West, Morris PR 6045 .E77
Cronin, A.J. PR 6005 .R68
Bunyan, John PR 3330 .A2
The easiest way to find Christian fiction is to search by author or title. "Christian fiction" Is also a genre heading that you can find by doing a Subject Heading Browse (with the caveat that not all Christian fiction and Christian writers have this subject heading). The following searches will retrieve results:
Keyword
Christian fiction
Christianity fiction
religion fiction
Jesus fiction
Mary fiction
Apostles fiction
Subject Heading Browse
Christian fiction
church membership -- fiction
clergy -- fiction
children of clergy -- fiction
religious fiction
Jesus Christ -- fiction