I’m no expert or even a great lover of renaissance music. However I do have the Friou book, Renaissance Music for the Harp, and it is excellent, and very playable by someone at the intermediate level.
I don’t know how historically sound her arrangements are, but they are very nice and the music is very enjoyable. In fact I recommend all her books, but this one specifically deals with renaissance music, and I would highly suggest it.
I have a book edited by Ank Van Campen, MUSIC OF THE XVIth CENTURY FOR CELTIC HARP (there’s also a Dutch title). It contains the usual Siciliana/Spagnoletta, a piece by John Dowland’s son Robert, and Mudarra’s Tiento IX and Fantasia X “que contrahaze la arpa en la manera de Ludovico” (originally written for vihuela, “imitates the harp in the manner of Ludovica”–lotsa chromatics), among other pieces. Copyrighted 1976 Harmonia/Hilversum. No idea whether it’s still in print.