The Superman series Superman Confidential was designed to showcase stories from the early years in Superman’s Metropolis career. The first story in that series (which didn’t actually finish until issue 11) was Darwyn Cooke writing about Superman’s first experience with Kryptonite. This was interesting to me, since there are a lot of questions about Kryptonite. For instance, how does everyone know it’s from Krypton? How does everyone know it’s harmful to Superman? Cooke and Sale take on the challenge and create an interesting story about it. So, how does Superman find Kryptonite?