283 pages/240 exercises.
The Virtuoso Pianist (Le Piano Virtuose) by Charles-Louis Hanon, is a compilation of sixty exercises meant to train the pianist in speed, precision, agility, and strength of all of the fingers and flexibility in the wrists. First published in Boulogne, in 1873, The Virtuoso Pianist is Hanon's most well-known work, and is still widely used by piano instructors and pupils.
The first part, consisting of exercises 1 - 20, is labeled "preparatory exercises." These are also the most famous exercises.