These songs and arrangements are copyrighted, which means the author(s) came up with the ideas and owns the rights and credits for them. They should not be handled in any way that would rob the author of the rewards of his/her labor. You should view your purchase as you would any regular physical item: please purchase the number of copies you want to exist at any one time. For example, if you only want 1 copy that will be shared and passed around among 3 pianists, you only need to purchase 1 copy. If, however, you want each pianist to have their own copy, you will need to purchase 3 copies. It's just like if you were to purchase physical sheet music from a local music store - if you want 3 copies, you need to purchase 3 copies. To purchase multiple copies, just type the appropriate number of copies in the "quantity" box at checkout. If you have any questions, feel free to send an email on the contact page.