While I haven't done any cooking from it yet (since I have so many recipes from my parents to use), it surely is an interesting read into a culture.
Sometimes I still buy cookbooks because I actually want to cook out of them -- well, to be honest, my husband is the cook. But more often now, I buy cookbooks that interest me in other ways, just like your old Czech book interests you as a way learning about a culture.
I love and collect old Jello pamphlets, for example, even though the thought of Jello dishes makes me want to gag.
But wow oh wow, those old booklets have the most beautiful lithos....they look like watercolor paintings.