The most reliable way to get the text is through the publisher or major retailers. While "Microeconomia" by Hal R. Varian is often out of stock in digital formats, you can find the physical seventh edition or used copies at:

While full copyrighted versions of the textbook are protected, several academic sources provide legitimate PDFs of lecture notes, summaries, and related exercises based on the Varian text: Microeconomia : Varian, Hal R., Medio, A. - Amazon.it

* Series Status. Not in a Series. * Format. Paperback. Hardcover. * Language. English. Spanish. Amazon.com Microeconomia - Hal R. Varian - Google Books

If you cannot find (or don’t want to risk) a free download, try these legitimate methods: