Hunting down a copy of 'Harry Potter and the Cursed Child' script edition is pretty easy if you know where to look and what to expect. Big online retailers like Amazon or Barnes & Noble usually have new copies in paperback or hardcover, and they often list different international editions. If you prefer to support local shops, Waterstones, Indigo (in Canada), or your neighborhood independent bookstore can order it for you if it’s out of stock.
If you want something a little rarer, check secondhand marketplaces like AbeBooks, eBay, or ThriftBooks—used copies can be cheaper and sometimes come with interesting markings or notes. Theatre gift shops at productions sometimes sell official scripts too, and the Wizarding World shop carries related items from time to time. I love flipping through the stage directions and seeing how the play reads on the page; finding a special cover or an early printing feels like a small treasure hunt.