What are good method books?
One must first decide whether to learn the Renaissance or Baroque style. If you wish to learn both, I would suggest starting with the Renaissance technique first. For Renaissance lute, some good method books are A Tutor for the Renaissance Lute by Diana Poulton (1991 Schott), or Method for Renaissance Lute by Andrea Damiani (1999 Ut Orpheus Edizioni). For Baroque lute, I suggest The Baroque Lute Companion by Stephan Lundgren (1993 Lundgren Edition), or Method for the Baroque Lute by Toyohiko Satoh (Tree Edition 1987). All of these books are valuable resources because each one contains helpful material not found in the others.