If you cannot afford the physical copy, here are legitimate ways to access the digital content:
Renzo Perfetti's " Circuiti Elettrici is widely regarded by students and educators as a cornerstone textbook for introductory electrotechnics and circuit theory in Italian engineering faculties. Key Strengths Methodical Pedagogy renzo perfetti circuiti elettrici pdf
Luca’s eyes drifted over the pile. Lecture notes, handwritten equations, graded exams from decades ago. And then, tucked between a binder on electromagnetic fields and a coffee-stained calendar, he saw it. If you cannot afford the physical copy, here