Here is a nice little collection on interface design & UX books, compiled by a lead UXer at Microsoft. Mobile payment, personalized chat, and mobile commerce via app ecosystems have been growing in popularity, so educate yourself! Whether you’re looking for general knowledge or something specific like touch design, you can always expand your knowledge by reading. No doubt you’ll find a few of these on the design studio’s bookshelf. Try picking them up on your next lunch break!