Show and Tell - NYTimes.com "Times change," says Carey Maloney, a partner in the New York design firm M (Group). And decorating books, he says, should change with them. Maloney and his partner, the architect Hermes Mallea, design houses and apartments for clients who collect Modiglianis and Roman sculpture, but for the first book on their work, the last thing they wanted was a standard coffee-table monograph, full of beautiful but static photographs and clichéd pronouncements like "Keep your silver polished." And since the things in rooms, whether museum-quality or flea-market finds, are what fascinate Maloney and Mallea the most, the resulting book is called "Stuff: The M (Group) Interactive Guide to Collecting, Decorating With, and Learning About, Wonderful and Unusual Things" (Pointed Leaf Press, $65). While there are plenty of photographs of the firm's work, they're shown in the context of the book's 40 collecting topics, each of which has its own "file folder" page. For example, the page for collecting maps, above, is followed by the photo, top, of a bedroom that is decorated with maps. And since Maloney felt strongly that the book had to have a digital component - "It was important that it look like 2012, not 2010," he emphasizes - the topics pages have Digimarc watermarks. A free app can scan the topics pages and take readers to links on a wide and quirky range of resources - which, for maps, includes links not just to high-end dealers but also to a Web page on map tattoos.