Reading place at home isn't a very necessary room or corner - it, of course, is going to depend on your needs. For those who love reading or for those who simply love buying books (there're such people, too) the place to hold books is necessary.
Various variants are possible - from a particular wall dedicated to that to a small shelf with the possibility to sit down alongside and to indulge into another world. For those who only wish to find the place for the books and who have stairs, I suggest to benefit from that - a soft place under the stairs and hundreds of books looks especially seductive - I'd say that the comfort is ensured. Of course, it's impossible to compare it to a pleasure while reading a book in a fresh air or sipping your favorite drink...:)
I have noticed myself that common stylistics unites a lot of collected examples - simple shelves of non-intricate forms and most frequently white-color shelves. And it should be like this - a book is by itself a decor element and when there's the majority of them a patchwork is formed, therefore, the more neutrally we'll frame the books, the better and the more orderly it will look like.