Credit to @KMWeiland for this insightful blog that I reference when writing. I am a big fan of Orson Scott Card (although he has some strange views around religion that I disagree with). One of my favourite go-to books is Speaker for the Dead. I use this novel structure taken from examples in Ender’s Game all the time when writing.
https://www.helpingwritersbecomeauthors.com/book-storystructure/enders-game/amp/
Writer & Novelist 
Ender’s Game is a great reference.
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