Despite some songs being split into 2 parts, they were originally recorded solo by Gershwin, meaning that they can easily be put back together. The scores are all perfect note-for-note transcriptions of the actual ways Gershwin played them in the recordings, which is the main reason I bought the book. You'll have to be a talented player like Gershwin to play the duets as solo, but they work out fine; no impossible reaches. This book is perfect for 2 early-medium pianists, or one early-advanced pianist, especially if you are a Gershwin lover. I should note that one of the scores, "Drifting Along with the Tide," is not actually from "Gershwin plays Gershwin: The Piano Rolls". It is actually a popular single of Gershwin and the specific recording that it is a transcription of is also available on Amazon as a single, or in some mash-up CDs. Don't let that trick you though, it as well as the others are all perfect transcriptions and are definitely a selling point for me and should be for many others.