I'm not a teacher but I do play guitar and sax with guitar being my main deal.
Guitar books will have nothing about voicing in them or breathing or certain sax tricks and the guitar licks might not always suit the sax but that might be an advantage as well ie to get out of familiar sax licks that everybody seems to play.
Voicing is using the oral cavity and airstream to produce notes and tones especially overtones which may extend into the Altissimo range higher than high F.
Studying a book written for a Eb Alto is probably easier than a guitar book as the guitar has a different range but transposing can be done.
Otherwise a guitar book can be useful for a lot of things as it's all just music in the end.
Guitar books will have nothing about voicing in them or breathing or certain sax tricks and the guitar licks might not always suit the sax but that might be an advantage as well ie to get out of familiar sax licks that everybody seems to play.
Voicing is using the oral cavity and airstream to produce notes and tones especially overtones which may extend into the Altissimo range higher than high F.
Studying a book written for a Eb Alto is probably easier than a guitar book as the guitar has a different range but transposing can be done.
Otherwise a guitar book can be useful for a lot of things as it's all just music in the end.
