Where do you live? I'm getting sticker shock at McDonalds.
I'm increasingly aksing myself why I would spend so much money on eating out when I could buy a nice book.
Anyway, the book in question is not cheap, but it is about the only typic of physical book I buy now. Most of my gaming material and novels are consumed digitally these days. But I do occasionally pay a premium for history books, art books, and particularly attractive rule books (especially beasteries and setting books).
Also, I find I reread and page through Art and Arcana, my Goodman Games Original Adventures Reincarnated, and similar history and art books than I do the physical rule books.