Duplicate Knitting Dictionaries

I am a collector of knitting dictionaries.  Even though lately I've been creating my own knitting stitch patterns I still love browsing through them.  So I heard about the ARCO knitting dictionary and that it was good so I hunted one down on a used book website.  But alas when I opened it, I had a deja vu, except for the title and cover it's identical to The Harmony Guide to Knitting Stitches.  So I wasted my time and money.  Be warned.