An attachable book holder is disclosed for a piano having a music rest, where the music rest has upper and lower outer surfaces. The attachable book holder comprises an elongate finger element and an attachment means which is connected to the elongate finger element at a connection point. The attachment means is attachable to at least one of the outer surfaces of the music rest at one or more contact regions. The elongate finger element is adjustable between a first orientation in which the finger element extends upwards from the connection point and a second orientation. The attachable book holder can be used on modern pianos which are supplied without book holders as part of the music rest, or alternatively the attachable book holder can be used to replace faulty or missing book holders on older pianos. In the former case there is no need to drill the casing of the book rest to attach the book holder to the music rest.