There are 1 books in the Upgrade Soul series. The newest book is Upgrade Soul which came out in 2018.

For their 45th anniversary, Hank and Molly Nonnar decide to undergo an experimental rejuvenation procedure, but their hopes for youth are dashed when the couple is faced with the results: severely disfigured yet intellectually and physically superior duplicates of themselves. Can the original Hank and Molly coexist in the same…
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