So, I was walking around some stores the other day and I came across Knuth's volume 4A "Combinatorial Algorithms". This was the first time I have seen this addition to the series and I was wondering if anyone here had the chance to sit down and read through it, and what comments you may have on it. My initial impression, based on the first 3 books, is that it would be worth the price tag however I would prefer some opinions prior to purchasing this item.