Negative Positive
Title: Great Reference Supplement!
Review: Although not one of the "hot" collectibles (at least yet), Pyrex has a fascinating history that a book like this helps to preserve. I acquired the supplement before the original book, and still it was a useful tool. I have been able to find items in this supplement that are not listed anywhere else, and it has enhanced my appreciation for Pyrex in general.
Is the review positive or negative? 