Leach, executive pastry chef at the Park Avenue Cafe, creates architecturally heady and refined desserts. Organized by season, each recipe in this treasure trove actually contains several sub-recipes: Roasted Pecan Napoleon with Chilled Pecan Terrine is a two-for-one deal, for example, and Caramelized Banana and Milk Chocolate Custard with Banana-Praline Terrine and Banana Fritters has three recipes that can be used separately. Each recipe contains assembly directions that include suggestions for piping sauces and placing garnishes. Unusual ingredients (such as jicama in Frozen Banana Timbale with Jicama, Lime, and Mint and chamomile in Warm Blueberries in a Strudel Shell with Chamomile Sauce) elevate dessert, so it is just as important as the entr‚e. Professional techniques and equipment are called for here, but home patissiers who are not afraid to experiment may be inspired by the meticulously thoughtful combinations such as Roasted Pineapple Tart with Basil Ice Cream or Fresh Figs with Crisp Corn Pudding and Frozen Fig Torte. There is no guidance on ingredients where to find tamarind paste, for example, so novices beware: much assembly required. However, the dessert titles alone could stand as poetry, with the added plus that results are delicate and innovative.