My great-grandmother was interned by the British in a concentration camp during the Anglo-Boer War of 1899-1901. The Lighted Rooms began as an act of homage to her, and the writing of it took me on a journey that ended up encompassing dementia, rare metals, forgotten conflicts, nursing homes, stock market bubbles, middle-aged passion and Victorian erotica.
Here's me talking about it. (I get both the American title and the dates of the Anglo-Boer War wrong. I did know them, honest.)