I also own this book. Nearly all exercises are easily understood without words. There is lots of material for practising scales, arpeggios, tremolo, rasguado, speed, syncing of both hands... Enough stuff for a whole lifetime
Reedition Domingo Esteso by Conde Hermanos 2004; Kenny Hill, model Barcelona 2001
"While you try to master classical guitar, prepare for a slave's life: the guitar will forever be your master and you its slave".