anyone who rents a variety of apartments in new york (or many other big cities with cramped spaces) will inevitably be vexed with the problem of narrow spaces between windows or doors. often these types of spaces may represent the only wall space in an apartment, creating a big problem for storage. a long history in furniture has taught me that very few companies make bookcases for very narrow spaces, and those that do seem to discontinue them quickly. so if you are one of those who've been faced with this dilemma, get your hands on a carlson white tower from cb2 before cb2 stops making them. while much of cb2's storage throws me off with features like "champagne stained nickel" and "frosted glass", the carlson comes in a bright white powdercoat finish that i can live with.
i've also seen people place a few ikea lerberg wall shelves (below) sideways, stacked above one another, in a narrow spot, as its spaces then become high enough and deep enough for books (smallish paperbacks, really). shown here in grey, it also comes in a clean, bright green.