

What looks realistic on screen is carefully pieced together from countless shots. An erotic moment feels much less hot if it’s the 29th time you’ve performed the exact same moment, and there’s a dozen guys standing around holding microphone booms and complaining about the lighting not being right, and some dude keeps sending for more fake sweat to reapply to your forehead.
Commenting cause I’m interested in the answer too. From reading online the basic idea is digging the cellar lower in the ground (how deep depends on your soil) to keep the temperature regular, and adding appropriate ventilation to remove damp and warm air.
Are you looking for other books because that ones not good? Or because you can’t get a copy of it. Because it’s in Anna’s Archive if you want to check it out (and then, if you like it, try to buy a copy).