With the modern advent of the book mega-store it's refreshing to still be able to find specialty stores devoted to their particular genre of literature. Whodunit? has mysteries, adventures and spy novels by the bushel are available at this Center City bookseller. If you can't find your most treasured Hercule Poirot or Sam Spade sleuth story anywhere else, Whodunit has it. Out of print mysteries are kept in stock. Don't turn to the last page first.

The American Institute of Architect's Bookstore sells a comprehensive selection of books on architecture, landscaping, interior design, remodeling and building plans. Texts for the professional, the "do-it-yourselfer" who enjoys working on your own house, or anyone looking for a book on Frank Lloyd Wright or Charles and Ray Eames, this specialty store carries one of the most extensive collections of architectural writing in town. The AIA Bookstore also carries high-end design items for home or office, children's books and toys, cards, stationary, posters, furniture, and, in season, Christmas ornaments. The bookstore and design center is owned and operated by the Philadelphia Chapter of the American Institute of Architects.

National Watch & Diamond is located in Center City at Jewelers row. They specialize in buying, selling and trading pre-owned modern and vintage watches. They have over 300 pre-owned Rolex watches in stock and also a selection of other fine, high end Swiss made watches. Each watch is inspected and refurbished by their watchmakers and are warranted for a full year. You can find contemporary and vintage Rolex, Cartier, Breitling, Ebel, Omega, Tag Heuer, Patek Philippe, Audemar & Vacheron and other fine Swiss made watches. Also, they carry a large assortment of Rolex diamond bezels and dials. They also have an extensive collection of loose certified Diamonds.

Joseph Fox Bookshop declared its independence in 1951 and has remained as such for almost 50 years. On a quiet section of Sansom Street, look for the oak sign with yellow letters. Walk down the steps. The bookshop is a cramped two aisles, with stuffed shelves and piles of classics on the floor. What makes small bookstores fun is that the selection tends to reflect the bookseller's taste rather than what's on top of the bestseller list: There's a good selection of good books here, not just popular ones. To your left, in the back, is a substantial section on architecture. If something you're looking for is out-of-print, they will do a search for no charge. A children's section is there to entertain the kids; you could stick your hand in anywhere on the shelves and come up with a good book to pass the time.

Departing from the trend of megaplex bookstores, Hibberd's is a pleasant reminder of days gone by. The small staff is exceptionally well read and prepared to assist with any literary quandary customers may have. Students from the neighboring Pennsylvania Academy of Fine Art frequent the store because of the large art book section.

"Where their name is their address," as the advertisements say. Specializing in fine diamonds, gemstones, gold pendants and other charms of precious metal. Liberty Bell jewelry and other Philadelphia theme pieces are in stock. This family owned establishment has been in business for over 60 years.

Maron has been producing decadent chocolates for Philly dwellers since 1850. Caramels, nougats, creams-you name it, if it has anything to do with chocolate, Maron makes it. The selection of chocolate covered items from pretzels to fruits and berries can make a "chocoholic" out of anyone. Custom molds can be made to your specifications. Corporate accounts and special occasion candies are available. Free delivery in Center City. See website for menus and more.

Black Tie formal wear has one of the most comprehensive selections of formal suits, shirts, shoes, and accessories. Choose from the most recognizable names in the fashion world. The racks are lined with selections by designers Perry Ellis, Ralph Lauren, Oscar de la Renta, Pierre Cardin and many others. The perfect fit for your exquisite garment is assured by on-site tailors. Dry cleaning, free delivery and pickup service is also available.

"The Army-Navy store with style", I. Goldberg features outdoor and working gear that is both functional and fashionable. Durable brands of apparel and footwear like Dickies, Carhart, Wrangler, Levi's, Timberland, Carolina, Herman, Black Rock, and Caterpillar highlight the inventory. Accessories for outdoor activities like hiking and fishing are also available. Goldberg is certainly not what you would expect from a typical army-navy store where designer fleeces are sold along with construction boots. Discount prices and 30%-off sales are common occurrences throughout the year. See website for online shopping and more.

You can't miss this place; just look up. Liberty Place consists of two skyscrapers; over 60 stores wrap around an atrium skylight connecting the two towers. Chain stores such as J Crew, Ann Taylor, Jos. A. Bank, and Coach complement the assortment of smaller businesses with more specific inventory. Take an escalator to the second level to grab a quick sandwich or a full meal in the food court.