From Learn Azure in a Month of Lunches by Iain Foulds.
You don’t need to learn everything about Azure to do some incredible stuff. Learn Azure in a Month of Lunches gets you started by breaking down the most important concepts and tasks into 21 bite-sized lessons, complete with examples, exercises, and labs. You’ll be productive immediately, and when you finish you’ll be well on the way to Azure mastery! This diagram shows how you can achieve true redundancy with an Azure web application.