Donald MacLeod.  P/M Donald MacLeod, MBE (1916-1982) was a Pipe Major in the Seaforth Highlanders and was one of the foremost pipers of the mid-20th century.  His 6-volume collection of tunes includes both new compositions and arrangements of older pipe music.  Most of the arrangements are relatively advanced and all 6 small volumes are similar so we won't repeat the description for each one.  The tunes are selected and arranged, and some are composed, by the author.  A classic collection of pipe music.