Instruments of the Middles Ages and Renaissance
David Munrow only wrote one book, and it was essentially an accompaniment to two records which acted as musical "illustrations" of specific Early Instruments such as the crumhorn, hurdy-gurdy, sackbut,
lute, et cetera.
He produced something similar called the Mediaeval Sound (a single record) which involved a vocal introduction on each instrument on side one. Munrow believed that discussing such a subject not only required written material, but also musical examples...otherwise it was all rather pointless.
Musica Reservata also did something similar.(see links below)