I recently contributed an article to Get Started With Gutenberg, a free publication produced by Heart Internet. Jumpstart Your Gutenberg Designs With SketchPress provides a detailed tutorial on using SketchPress: a library of WordPress admin interfaces, symbols, and icons for use with the popular design toolkit, Sketch. With SketchPress designers can create high-fidelity mockups of custom blocks and other editorial interfaces for both Gutenberg and classic versions of the WordPress admin. SketchPress and other open-source projects from 10up are available on GitHub. You can pick up a copy of the book at WordCamp Europe or download the digital copy.