I have that one as well ... found it in my grandmother's attic years ago. Unfortunately, the mice had gotten to the back cover a little bit and the adhesive holding the spine and pages together had dissipated over the years as a result of the fluctuations between summer heat and winter cold.
I still have it, but it's pretty much contained in a zip-lock bag to keep it all together. What a shame ...
They have done reprintings of that book. You can get a new one if you like on amazon.