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kotlinlang

Hey everyone, I'm kicking off a kotlin android project and was looking for a good book to pick up the kotlin language. It seems like a lot of the material out there is geared toward people with a java background, but I don't have much experience with Java. When I was learning javascript, the You Don't Know JS series was great, so I'm hoping for something similar but for kotlin. Do you have any books you can recommend firsthand?