petty_anthropology 's review for:

To Paradise by Hanya Yanagihara

5.0

emotional sad tense medium-paced

Plot or Character Driven: Character

Loveable characters: Yes

Diverse cast of characters: Yes

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This is three books in one. The third book is where it is at.
Maybe dabble with the second. 
The main things you need to know is that the names repeat and that homosexuality is not stigmatized nor criminalized in his parallel past.