I strongly believe that one of the best investments for your money is a good book. I have many paper eBooks and also in electronic format, many of them are technical, although I also have novels, biographies, etc.
Well, you only need to go to the official MS Press website and select “Free ebooks”. This option will take us to a special section of Microsoft Virtual Academy dedicated to technical books. If you filter by Azure, you will see that we have 6 books available dedicated to the subject,
As you know, if you want material for this summer… as you know 😀
MS Press: https://www.microsoftpressstore.com/
Free eBook: http://www.microsoftvirtualacademy.com/ebooks