John Arnold is the author of three marketing books in the best-selling “For Dummies” series: Web Marketing All-in-One Desk Reference for Dummies, Mobile Marketing for Dummies, and Email Marketing for Dummies.

John also writes a monthly marketing column for Entrepreneur Magazine, online at Entrepreneur.com.   John is the President of Aveta Marketing, a Boulder, CO based digital marketing agency and consulting firm that specializes in marketing training programs for all kinds of small and large businesses.