Karan Gulati (SSAS Maestro)

Microsoft Azure Essential: Azure ML Free book is pretty informative if you wanted to learn about ML.

Link as follow:

Download the PDF (5.84 MB)

Additionally I recommend to go through free courser from University of Washington available through coursera.

Step by Step course of going in depth of Machine Learning.

Link as follow:

https://www.coursera.org/course/machlearning