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Additionally, the actual piano sheet music from each of the ten "Final Fantasy Piano Collections" albums has been published as ten corresponding music books by Yamaha Music Media. Each book contains the original music, exactly as arranged and performed on the albums. Unlike the Original Score arrangements, these pieces are intended only for advanced players as they are generally more difficult. Sheet music for the "Final Fantasy XI Piano Collections" album included in the "Final Fantasy XI OST Premium Box Set" was included in that box set, and, like the album itself, is unavailable for purchase elsewhere; sheet music for the identically named standalone piano album is published by Yamaha.