That "Understanding Women" tome probably wouldn't fit in my Kindle's memory (8Gb)! Joking of course, but that is one big book!
FYI, 8Gb holds a lot of books. I looked at my collection of eBook novels, 7213 of them currently, and that takes up 5Gb. But I store each novel twice - once in Kindle format and once in EPUB format. So really, my novel collection should fit into about 2.5Gb if it were only a single format for each book. Based on my collection, an 8Gb Kindle should hold about 21,000 books. Why they decided they needed to make a 32Gb version of the Kindle is beyond me. But you can buy one. IMHO, the Kindles poor navigation features limit you to about 3 or 4 dozen books. More than that, and it's quite cumbersome to search for anything. I leave my books on my computer and only put a limited selection of about two dozen or less on the Kindle at any given time.