With more than two million books in print, David D. Buschis the world's #1 best-selling camera guide author, with more than 100 guidebooks for Nikon, Canon, Sony, Olympus, Pentax, and Panasonic cameras, and many popular books devoted to digital photography and imaging techniques. His best-sellers include Digital SLR Cameras and Photography for Dummies, which has sold more than 300,000 copies in five editions, and Mastering Digital SLR Photography, now in its Fourth Edition.