Schirmer's Library of Musical Classics Vol. 925 is a paperback book titled "The Virtuoso Pianist in 60 Exercises" by C L Hanon. Published in 1967 by Hal Leonard Corporation in the United States, this book focuses on classical music and contains 115 pages of exercises designed to develop the skills of a virtuoso pianist. Written in English, this book is a valuable resource for musicians looking to improve their piano playing abilities through structured practice exercises.