Thanks for the kind words about Modern Java Recipes. The Kotlin Cookbook takes the same philosophy, in that it's a series of short descriptions about solving specific problems. I mostly collected the ideas from either what I was learning at the time or questions being asked in the public Slack channel.
The difference between the cookbook approach and a regular book is that in the cookbook I don't assume you are learning the language step by step. I use whatever the language provides, practically from the first chapter. That means it probably shouldn't be your only Kotlin book, but it's a nice supplement to standard expositions like Kotlin in Action (which is still a great book, even if it's a little dated now).