Should I do 1 or 2 books?

So I'm writing a fantasy novel.

But I'm debating if I should split it into two books of Around 400 something pages.

or if I should have it as one 1000+ page

book what do you think I should do?

Two 400 page book 📚
One 1000+ page book 📖
Select gender and age to cast your vote:
Should I do 1 or 2 books?
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