 Passionate about his own music, Braille took meticulous care in its planning to ensure that the musical code would be "flexible enough to meet the unique requirements of any instrument".In 1829, he published the first book about his system, "Method of Writing Words, Music, and Plain Songs by Means of Dots, for Use by the Blind and Arranged for Them".Ironically this book was first printed by the raised letter method of the Haüy system.