Publisher's website: You can try visiting the publisher's website (in this case, Bollati Boringhieri) to see if they offer an e-book version or a digital companion to the textbook.
Online libraries: Some online libraries, such as the Italian National Library or university libraries, might have digital versions of the book available for borrowing or downloading.
Academic repositories: You can also search for academic repositories, like ResearchGate or Academia.edu, where authors and researchers often share their publications, including textbooks.
Second-hand bookstores: If you prefer a physical copy, you can try searching online marketplaces or second-hand bookstores.