Every band composer needs to have a good library of band music to study. Here, I'll be linking some of the great band scores that are freely available on IMSLP (or other hosts).
A major early Romantic work for band.
This score is the standard edition edited by Colin Matthews, but it does not reflect accurately Holst's original scoring.
Like the 1st Suite, this is also a modern edition.
A little-known piece by Grieg for band that highlights late 19th-Century scoring.
One of the most important and well-scored works for the wind band for any time period.
The British classic.