I would go from Yvonne's Addicted to Jenni Debbage's
A Universal Union - Book One Both these stories used red kryptonite in a slightly different way. In Addicted, it's used as a drug. In Universal Union it's used as a source of heat.
[By the way, check out Book's Two and Three of Universal Union as well. Oh, and Jenni, when are we going to get Book Four

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