The Case For Marionette.js - A quick overview of what Marionette is and why it's useful.
Connecting Data To Your Views - A look at Marionette's approach to Views and data-binding
Building Complex Layouts with Marionette.js - A post to explain Marionette's Regions and layout system, with a focus on complex nested layouts.
The Life of a Marionette View - A rundown of the various stages of a Marionette View's life cycle
Building Modular Web Apps with Backbone.Radio - This post examines how to use Backbone.Radio to improve the maintainability of your Marionette projects.
Staying DRY with Marionette Behaviors - A look at Behaviors and how they help you avoid repetition in your Backbone code.
I've had the opportunity to learn a lot from the Marionette team and community through their gitter room. These posts have been much more accurate as a result. I also originally began to understand Marionette after reading Building Backbone Plugins by Derick Bailey, the creator of Marionette. I highly recommend both of those resources to anyone interested in Marionette or Backbone development.