For the second part about where to download, "Dove scaricare ‘La canzone di Achille’ in epub?" becomes Dove acquistare ‘La canzone di Achille’ in epub. Then the list includes Amazon and Google Play, which are brand names and should be left as is.
Variations for "disponibile": è acquistabile la canzone di achille epub
I need to proceed line by line, replacing each word with three variants, skipping proper nouns. Let's start. For the second part about where to download,
Need to make sure not to include any proper nouns, which are capitalized names like Achille, Madeddu, and potentially any other capitalized words. For example, "e-reader" is a technical term but not a proper noun. Let's start
"Una" → Un but again, gender and number. "Una" is feminine singular. So Un but "Un’" is a contraction. Maybe Una (with elision) but not sure. Alternatively, Una but that's incorrect. Maybe just Una.