If you want to convince your kids that reading is cool, bring them here. Opened in 2005, this sleek $11.6 million library is 54,000 square feet of books, computer labs and auditorium. The "Teenscape" room is identified by a light blue neon sign, and at the entrance to the children's library there's a fully stocked aquarium. The best feature? It has a 250,000-book capacity and also partners with the Plano Public Library System. If Allen doesn't have the book on their shelves, they can get it for you. Best of all, you don't have to be a resident of Allen to use this library. Call it the open-book policy.