I guess Luke wants us to create new options, not vote on the existing ones.
This said, here are my feelings from looking at the pictures:
#2 and #3 are “someone is playing with the font trying to impress me”, which repels me for similar reasons articles using many font colors repel me; it feels desperate
#1 feels like an elementary-school textbook
#4 feels like a novel
So I think #1 would be great for a gentle introduction into the topic of artificial intelligence for lay audience; and #4 would be great for a book like GEB. But I guess the prepared ebook is neither.
I guess Luke wants us to create new options, not vote on the existing ones.
This said, here are my feelings from looking at the pictures:
#2 and #3 are “someone is playing with the font trying to impress me”, which repels me for similar reasons articles using many font colors repel me; it feels desperate
#1 feels like an elementary-school textbook
#4 feels like a novel
So I think #1 would be great for a gentle introduction into the topic of artificial intelligence for lay audience; and #4 would be great for a book like GEB. But I guess the prepared ebook is neither.