The infinity concerto
Greg Bear (Author), Kinuko Craft (Illustrator)
"There is a song you dare not sing ... a melody that you dare not play, a concerto that you dare not hear. It is called a Song of Power. It is a gateway to another world--a gate that will lock behind you as you pass, barring you from the Earth forever. When the Song calls to you, you must resist. For it is a world of great danger as well as great beauty--and it is not good to be human in the Realm of the Sidhe."--Page 4 of cover
Print Book, English, 1984
Berkley Books, New York, 1984