It took two years and $17 million, but Houston finally has its downtown library back. Was it worth the wait? Not for some purists, maybe, who have carped that the place no longer seems as book-centric as a library should be. But the rest of us can revel in the wider, airier aisles, the coffee bar, the Wii room, everything the planners have done to get more people into the building. You can still find any book you want; you just have to dodge a little more of modern life while doing it. A good trade.