Opera intitulata Fontegara
A treatise about recorder playing, ornaments and passaggi.
The book gives rows and rows of ideas on how to ornament a certain interval: "when you go one step up, you could ornament it in these ways." It includes some very complicated patterns in difficult rhythmical values like quintuplets and septuplets.
A translation can be found here (free):
Solo / Ensemble
Silvestro Ganassi dal Fontego
Type of Thing you Learn