Poet and literary critic Dana Gioia and I wrote this short online essay about Morten Lauridsen’s signature work O Magnum Mysterium, which is sung all over the world. https://www.thecatholicthing.org/2022/09/01/spell-bound-morten-lauridsens-o-magnum-mysterium/
See my 2018 article on O Magnum Mysterium, which provides a full discussion of the genesis of the work: https://timelessmusicandpoetry.org/project-detail-with-description/