Dummies guide to starting a business: Later through the decade, during the height of the fleck-com boil, the For Dummies books truly helped build up fashion competence. People who were not familiar with computers were looking for easily comprehensible information regarding operating systems, software, and versions. IDG Books co-founder and CEO John Kilcullen observed a client of a computer software store while he was employed in New York at Bantam Doubleday Dell issuers and realized he needed a simple-to-read book about CPUs.