On the Laravel News site there's a post about a new resource for learning more about Laravel and how the framework really works: Diving Laravel.

Mohamed Said, creator of the Laravel Forge SDK, Laravel Language Manager, and more has launched a new learning resource called Diving Laravel. [...] The site currently has the following topics, and more will be added in the future: The Exception Handler, The Task Scheduler, Package Auto Discovery, The Notifications System, and Diving Redis.

The site breaks each of the components down into "dives" with smaller tutorials covering different aspects in each. All of the content is free for anyone that wishes to get a more in-depth look at what happens under the covers when Laravel handles your code.