That's a great example -- I know people who have that and feel a religious zeal for it. That "religious zeal about a technical / science created with art and care" book is the feeling I'm really after.
Right, exactly: when that much care is put into a resource, I truly feel that I enjoy it more, even if the material itself might seem dry at first. Those kinds of feeling books are truly special.
100%, which reminds me: another example of books created with incredible care are anything by Douglas Hofstadter. The canonical example is Goedel, Escher, Bach; but one that I think is super under-rated is Le Ton beau de Marot -- not only does he care about the content, but the page layout, the font, everything. Truly a labor of love and obsession.