Reddit mentions of Mastering the Art of Arms, Vol. 2: The Medieval Longsword

IMO, the best book for beginners for longsword is Guy Windsor's https://www.amazon.com/Mastering-Art-Arms-Vol-Longsword/dp/9526819322/ (and his older book https://www.amazon.com/Swordsmans-Companion-Guy-Windsor/dp/9526793404/ is good too). He does Italian longsword; for German, you could try Tobler's https://www.amazon.com/Fighting-German-Longsword-Christian-Tobler/dp/1937439232/

Of course, there is plenty of stuff online, too.

First of all, which book exactly do you mean? Guy Windsor has two books the titles of which include "Medieval Longsword":

1. The Swordman's Companion: Medieval Longsword
   https://www.amazon.com/Swordsmans-Companion-Guy-Windsor/dp/9526793404
   
   
2. Mastering the Art of Arms volume 2: The Medieval Longsword
   https://www.amazon.com/Mastering-Art-Arms-Vol-Longsword/dp/9526819322
   
   It just so happens that both books describe several different kinds of footwork and different footwork drills on their pages 64-65 -- or at least they do in the editions I have. So you're going to have to be far more specific.

I'd recommend this book, The Medieval Longsword by Guy Windsor . In the intro, he breaks down the sword by its parts and functions. Then he goes into a bunch of beginner exercises, sword handling drills, and other really great starting off material for Longsword. The HEMA group I practice with uses Guy's syllabus for our classes and it is highly effective! I've also attended two of Guy's seminars, he's very knowledgable and good spirited, he's been studying Fiore for over 25 years now!

I have several books, and I'd point you to:

Sword Fighting: An Introduction to handling a Long Sword by Herbert Schmidt - this covers the German Liechtenauer techniques.

Mastering the Art of Arms Vol 2: The Medieval Longsword by Guy Windsor - this covers the Italian Fiore techniques.

Both books are modern interpretations of the historical techniques, written by instructors, with lots of photographs showing multiple angles of a particular action. Useful for a beginner and an intermediate practitioner as you can see exactly what you are suppose to do, instead of having to decipher a translation or drawing.