ISPI and Pfeiffer are partnering to bring you a special limited time sale on Wiley books. As an ISPI member, any book you order directly from Wiley through January 5 will be 50% off. That includes publications from all of the great Wiley brands you know and love, including Pfeiffer, Frommers, For Dummies, Jossey-Bass, and more! Click here for some of the favorite titles of ISPI Members, but there’s much more at! Enter ISP50 at checkout to save.