(1963 on left, 1991 on right)
Richard Scarry's Best Word Book Ever, 1963 vs 1991 editions (with revisions). The 1963 edition is my own, bought for me in the late 60's when I was a toddler, and read to tatters. The 1991 edition belongs to my kids today. I was so familar with the older one that I immediately started noticing a few differences, and so have catalogued 10 of the more interesting differences here in this collection.