Atomic Kotlin is the book and associated learning resources by Bruce Eckel and Svetlana Isakova.
January 11, 2021: The print book is available.
December 9, 2020: The eBook is finished and published on Leanpub.
We thought the book was done before but ended up going over and over it, and adding material for Kotlin 1.4. We found lots of things to improve. It’s really done now, and this is the version that is in print. Thanks for your patience and we hope you enjoy the book!
Announcement during the October 2018 KotlinConf opening keynote:
The cover of the print book: