I don't know if this is antithetical to these recipe/cookbooks, but please consider teaching coherent themes or design principles via these recipes, rather than simply providing an assortment of useful tidbits. Erlang has such a unique foundation (functional programming + event-driven awesomeness) and so few books that there is a great opportunity to teach the Erlang mindset/perspective and not just a bunch of tips and tricks.
Very good and valid point, and it is pretty much at the foundation of the book approach (short guides ondesign principles when applied to real tasks, not just the theory)
