And as an aside, mundane doesn't mean "boring". Maoyu is a very engaging anime with next to no fighting and a plot that focuses on developing agricultural technology and bringing lasting economic prosperity to a people mired in misery, all while ending an ages long war between humanity and demon-kind. Spice And Wolf is about a capable merchant who teams up with an even more capable wolf harvest deity, and how they combine their smarts and experience to create large profits over the course of their adventures back to her original homeland.
What Daily Life and Economics brings to the table is the production, agriculture, manufacturing, and infrastructure pieces. It helps a GM answer questions like, "How many pigs can this farmer handle? How many employees do I need to hire to make 20 garments a day?" It has a great mix of background information, research, and GURPS mechanics. It does not rely too heavily on any other existing books, but does reference the main Low-Tech book occasionally, and makes references to the Basic Set more than a few times.
IntroductionFirst off, this is not a small book. Looking at the Table of Contents, there are a lot of contents.
Food and Population
Mining and Excavation
Shelter and Architecture
Other Notes and Conclusion
Precis - Review of Low-Tech Companion 3: above and beyond, my favorite in the series.