The Bickerton book is great but be aware that, as "An "Illustrated Guide", most of it is simply photographs (alebiet very good ones) and basic descriptions of each glass.
A couple of other "classic" books that you might still find are:
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Glass through the ages by E. Barrington Haynes, first publsihed 1948, revised 1959
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The Glass Collector, A Guide to Old English Glass, by Maciver Percival, published in the days when they did not include the publishing year! (I have a second edition, also no publication year)
Although none of the books I mention cover much on the comparisons of "modern" with "old", there are some very useful pointers in each of them to the relevant features of 18th century items. Maybe some of the other books mentioned earlier do give details for comparion between 18th century and later glasses but that is a field that, some years ago, I found difficult to get much detail on. So I stopped trying to understand it.
Copies of old glasses have always been made and, as with many other "old vs copies" items, it is only with much experience that the copies can be more easily identified.
Some time ago (when I was using Tinypic for glass images) I put up a fun quiz photo, although in relation to a genuine query. The image is now on GlassGallery and
can be seen here (clickable for larger version). The question was, "Which of the glasses is a fake?" Sizes (decimalised inches) and weight (grammes) for each are given in the photo to either help or confuse.