>>512246405
>What's the point of having two voices alternating?
At times there's no point other than sharing the work and showcasing two different voices (male versus female) with two different accents (American English versus Italian native speakers), at other times it's because it's a dialogue or can be presented as a dialogue (e.g., one asks, "Estne Gallia in Eurōpā?" and the other answers, "Gallia in Eurōpā est.").
>Do you have a link to the color version?
I bought a physical copy from the publisher. I enjoyed having it open on my desk and following along with Mr. Ranieri and the Italian girl when those videos were still up:
https://www.hackettpublishing.com/lingua-latina-per-se-illustrata-series
For archival and easy searching alongside your physical copy you can find different versions on Archive.org, Library Genesis, and other internet libraries, e.g.:
https://archive.org/details/lingua-latina-per-se-illustrata_202506/Lingua%20Lat%C4%ABna%20per%20s%C4%93%20ill%C5%ABstr%C4%81ta/Pars%20I/Familia%20R%C5%8Dm%C4%81na/

>>512247338
Very cool, thank you. Are there more of these? FAMILIA ROMANA goes up to Cap. XXXV.