My review of the new translation and edition of Johannes de Grocheio‘s music treatise has been published inthe journal Speculum.
The link a the bottom of the page is the official one to the CUP site, which requires institutional (or personal) subscription. According to the permissions information on the CUP site, however, I can also post a more freely available pdf here too (directly below).
Johannes de Grocheio, Ars Musice, ed. and trans. Constant J. Mews, John N. Crossley, Catherine Jeffreys, Leigh McKinnon, and Carol J. Williams. (TEAMS Varia.) Kalamazoo, MI: Medieval Institute Publications, 2011. Paper. Pp. ix, 168; tables. $20. ISBN: 9781580441650.