: For specific topics covered in the book, educational sites like
Hope this helps with your exam prep!
Sometimes authors upload previews on ResearchGate. GitHub is unlikely to host copyrighted textbooks. If you find one, it is almost certainly pirated.
If you're looking for a comprehensive textbook on electrical machines, then "Electrical Machines" by P.K. Mukherjee is an excellent choice. You can easily find the pdf version of this book online, just make sure to verify the authenticity of the source.