Top shelf: reference - Bibles, dictionaries, concordance, official prayer books, etc.
After that: OT, general Bible, NT, biblical theology, church history (chronologically), historical theology, theology, liturgical theology, liturgics, prayers, interfaith prayers, biography/autobiographical theological stuffs, Jung's autobiography, religion as academic curiosity, religion/sociology, women's studies, sexuality, race studies, Gospel Mission, pastoral care, other nonfiction.
In the bedroom: fiction, personal devotional stuff, periodicals, journals.
There is no ethics section in that schema, nor is there leadership (though I think I had leadership after pastoral care at one point, which I could live with). I now have ethics books (and leadership books). Oh, and preaching, but that stays on the "current quarter" shelf for a while because we're using those books all year.
The question: where should ethics go? It doesn't make sense to put it with my one other ethics book between pastoral care and other. Do I put it between theology and liturgy, because it really flows best from theology? Then there's a disconnect between ethics and liturgy. Do I move theology, and run "biblical theology, theology, ethics, history, liturgy"? Then I lose the great chronological flow from New Testament into early church history, and the great connection of "theology, liturgical theology, liturgy." Does ethics belong between personal testimony/biography and cultural studies? Then where does "religion as academic curiosity/sociology" go?
I know this is a subject dear to the hearts of many readers. (Ok, a large percentage of readers - I'm not sure I really have "many" readers to begin with.) What would you do? I value greatly having my subjects flow into one another, and would be sad to have to adopt strict library-style separations. On the other hand, the more books I get and the more specific they become, the harder the flow becomes in some places.