Right away. As soon as the payment is completed, you'll find the download link on the confirmation page, and the same link will also be sent to you by email. You can download the PDF and read it wherever you want: phone, tablet, or computer.The link stays active for 30 days: save the file as soon as you download it, so it's yours forever.Didn't receive the email with the link? What do I do?First, check your spam and promotions folders: nine times out of ten it ended up there. Also, make sure you looked in the inbox you used for the purchase.If it’s not there, write to us at cambialaprospettiva@gmail.com with the name used for the order: we’ll resend the link, even if yours has expired.