Hibike! Euphonium (fictional book)

'''Hibike! Euphonium''' is a fictional book of for euphonium composed by Masakazu Shindou. One of the few published copies belongs to Masakazu's daughter, Asuka Tanaka, which he sent to her along with his euphonium, when she was young. She constantly practices the pieces within the book when she has time. She highly cherishes it, as it is one of the only reminders of her father that she possesses asides from his silver euphonium.

One of the etudes in the book is also titled ''Hibike! Euphonium'', and is Asuka's favorite. She is seen practicing it outdoors in "Troubled Nocturnes" and plays it again for Kumiko Oumae in "Sound! Euphonium".

The melody of ''Hibike! Euphonium is a recurring leitmotif in the soundtracks of the anime's second season, and is particularly pronounced in track 28: 重なる心 (Overlapping Hearts)'', from the soundtrack of the first season.

Upon graduating, Asuka gives the book to Kumiko, saying that she now has more use for it than herself.

The book ''Hibike! Euphonium'' appears primarily in the third light novel, and in the second half of the anime's second season.