Armies of the Middle Ages, Volume 1
The first book on the list is the ubiquitous Armies of the Middle Ages, Volume 1, Ian Heath. This famous book amongst wargamers, (possibly of a certain age? Lol) is chock full of line drawing illustrations, brief descriptions of battles and the arms and armours of the men who fought in them. It ought to be an indispensable part of anyone's book collection who is into Medieval Warfare, whether a wargamer or not. I think I have owned my copy for 25 years! Unfortunately, Heath does not include a description of Fornovo in this book but it's worth it for all the other information appropriate to the 'period'
The Great Italian Wars 1594-1544
(Ray Lucas, Battery Press)
This book was written specifically with the wargamer in mind and contains OOB's for most of the major battles of The Great Italian Wars including Fornovo, Cerignola, Garigliano, Ravenna, Novara, Marignano, Bicocca, Pavia and Ceresole. It has quite succinct descriptions of how all the rivalry, strife etc went during the battles. It also contains some great line drawing maps that makes for the planning the terrain for any particular battle a lot easier. Again, like Ian Heath's book above, this should be ubiquitous if you're interested in this era of warfare.
The Art of War in Italy 1494 - 1529
(F L Taylor)
This famous essential tome is simply a must. Taylor goes into some depth looking at strategy, how the infantry was utilised contrasting their use to that of the different cavalry types, both light such as Stradioti, Francs Archers and Mounted Crossbows, Firearms. There is also an comprehensive look at Artillery and it's battlefield use as well a a great chapter on all round tactics with all associate components of the armies. He looks at siegecraft and there is even a section dedicated to examining the military writers of the era. The book is mainly dedicated to The Battle of Ravenna but Taylor does explore the earlier conflicts as well in order to compare and contrast.