Microsoft continues to provide free resources to allow IT professionals to learn about their new technologies at no cost. Hybrid Cloud deployments based on Cloud services such as Microsoft Azure will be a big part of the infrastructure landscape over the next few years.
Azure is a platform and set of services that are undergoing rapid change. If you are looking for a primer on what Azure can offer, and how you can start your journey in the Cloud, then grab a copy of the recently released 2nd edition of Microsoft Azure Essentials: Fundamentals of Azure. Available as a downloadable PDF (ePub and Kindle formats also available).