This is a litany by Bernadette Farrell with a refrain for the assembly and declaimed verses by the cantor.
Check out the text of the verses in the sample at OCP, where they sell the sheet music, for a broad range of saints from outside the box. They suggest it’s use in a paraliturgy concerning social justice, but many of the verses will fit more usual liturgies, and obviously you could create your own local list.
The version in GAB says the author specifically did not want guitar chords on the piece. The chords are on the keyboard version, so I suppose it is for organ only. These chords allowed me to make a backing, but it is for the refrain only – the spoken verses are all yours.