Lito's original book (c. 1985) was hugely worthwhile *for it's time*. It was truly a "breakthrough" because it was the first book for average, recreational skiers that openly challenged TTS dogma. It was hugely influential in helping me and many others try to ski in a different, more effective way. Following it made it easier for me to adapt to PMTS, because I had fewer bad movements to unlearn.
It's technically obsolete now, thanks to you, but I still have vivid memories of watching friends flounder to survive with rotation based skiing whilst I was letting the skis do the turning for me.
For current books, meaning anything in the last 20 years, theres only one useful source. The Deslaurier book is interesting, but PMTS covers technique better. Everything else I've seen is garbage.
Spoken as a Vintage Ski Poster!