Que Certification is among the industry's leading providers of IT certification training materials, publisher of the Exam Cram 2 series, the best-selling certification series of all-time. Que Certification's books are written by authors who are recognized experts in the field. In most cases, they are current or former instructors, trainers, or consultants who not only know what you need to know, they know how to present the information in a manner that is easily understood by reader.