Mehta writes in a conversational, question-answer format. Instead of dumping equations, he asks: "Why does a DC motor draw high current at start?" Then, he builds the answer logically. This method is ideal for self-study.
You can download the PDF version of "Principles of Electrical Machines" by V.K. Mehta from various online sources. However, ensure that you obtain the PDF from a legitimate source to avoid copyright infringement. Principles Of Electrical Machines -v.k. Mehta-.pdf