Do pages really matter? If you read more books, it's still more pages than ONE book.
Well, it depends what you like. Sometimes its fun to read a short book because you can read the entire thing at once. But If I buy a book I like to get long ones, so its more worth my money. It also depends on font size and the style of the book.
There are some books that are 400-500 pages, but written in a poetic style, with the words forming images on the pages. These books can be read quickly because of how the words are printed. The books could be condensed to 200 page books if they removed the poetry from them, but the books wouldn't make as much sense.
I guess pages don't really matter, but it's nice to know what you're getting yourself into, and what size of book you are looking for. And the grandeur of the story...