My books are not organized right now… have not done it since the move. They are still boxed. This is how I organize them when done:
History together, broken up by topic matter, Holocaust section placed wherever it is not likely to be brushed against because I have some rare ones. Books about Rromani Gypsies in the Holocaust in a sub grouping. My Porrajmos DVD (our word for the Holocaust) goes in here, not in my DVDs. I have some historical fiction in there if it is accurate to my knowledge. For instance, I used to have (sob) a series of fictional representations of ancient Scottish history that jived with what I know of the topic… basically novels fleshed out of recordings of ancient Scottish history. They were really good, I purchased them at the Highland Games from the author (sobs again).
Rromani Gypsy… everything, fiction and non fiction, other than about the Holocaust, which is in the Holocaust section.
Nonfiction (other than history and about my people), grouped by topic, if more than one book per topic, the remainder in alphabetical order in its own section. Books like my Frank Lloyd Wright’s glassworks and Rennie McIntosh works go somewhere they are not going to be brushed against.
Fiction, by order of author. Historical fiction that is not accurate historically, rather just for fun, goes here. Most of this is sci/fi and fantasy.