I also asked her, and this is what she replied:"Apologies if this has caused confusion. You can submit .playground files that work with Xcode 11.4.1, or .playgroundbook files that work with Swift Playgrounds app v3.3 on Mac or iPad."You can find the Tweet on her profile!So this means we can for sure use playground books!
Topic:
Community
SubTopic:
Swift Student Challenge
Tags: