I'm not the first person to bring this up. Though now I forget where I first read about it. The three novellas in Fifthhead resemble the Solar Cycle in structure. Almost exactly. The Fifthhead of Cerberus is New Sun. The memoir of someone that slowly figures out they are a clone. It even shares some of the same themes and motifs. The use of dreams and a play. The nature vs nurture debate. The planned perfection of an individual though generational changes. Monkeys. Half robot half men. Even the mixing of high brow with more pulpy stuff, with the monster battle at the end. A Story is Long Sun. A cobbled together fairy tale. With an emphasis on individual patterns of speaking and religion. Naming conventions. People getting stuck in a pit. It ends with a planet getting colonized. VRT is Short Sun. Told as journals from different time periods, as well as a larger frame story. About a man that doesn't realize he's another man. Wacky alien animals. Lots of hunting. Tall tales. Vaguely eastern European people. Apologies if this has been related here before. And too whom ever in the Wolfe pack I first heard it from.