From the Publisher
As the originals were arranged for female voices, the canons by Johannes Brahms are - except for a few necessary transpositions - well suited for a transcription, all the more so since there are few romantic pieces for the flute of such high quality which can at the same time be played so "easily". The Canons VI, VII, IX and XIII are double canons: each flute plays its own part, the same applies to canon IV. In the remaining canons, the 1st part is played solo up to the first double bar, then the 2nd flute enters playing the first part while the 1st flute starts at the beginning of the 2nd staff, and so on. This rotation method holds true for flutes I-IV as of bar 28 in the 6-part double canon XIII.
Difficulty level, roughly compared to ABRSM exam grades. 0 is beginner, 9 is advanced (beyond grade 8).