Perhaps the most successful space in the controversial Frederic C. Hamilton Building is the new Denver Art Museum shop built into the formerly bleak and cavernous lobby. Roth Sheppard Architects, one of the city's most distinguished firms, did an undeniably brilliant job of using all those dramatic glass and canted walls — and then the museum did an equally commendable job of filling the shop with an incredible inventory. It includes not only a big assortment of arty gift items and jewelry, but also a vast selection of books that makes it the best art-book store in the state. The Hamilton's interior is clearly a work in progress, but with the installation of this new gift shop, it's off to a good start.