I have sold several Grosset and Dunlaps in my 22 years on Ebay, and the moment I found this book I was impressed by the condition.  Nice bright colors, spine nice and tight.  Not written in and minimal wear to the pictorial boards.

First edition, 1964 copy of next to last book in original series.  Lists to itself on back board and on list of books in series include in front.

Non-smoking home.  Media Mail shipping with a priority mail option if you want it quicker.