Haarklou Johannes. Poetiske Klaverstykker Op. 27

Kristiania: Oluf By's Musikforlag, 1907. — 16 p.Haarklou was a versatile composer. He wrote works for the piano, the organ, the violin, and for orchestra, in addition to romances and songs for different choirs, for example the well-known composition "Varde", with lyrics by Per Sivle. He composed cantatas, symphonies, and five operas. The oratorio "Skapelsen og Mennesket (creation and man)" may be regarded as his greatest work, yet he is best known for his sonatas.
He gave concerts in Norway and abroad, in some cases with financial support from the Storting (Parliament). He taught at the Musikkonservatoriet (music conservatory), and he wrote reviews and music history articles for newspapers and magazines.