It was the lack of a book that had all the information that Ashley Bell required which led her to work on putting together her own book which highlighted the basic information that everyone needed to know about adult ADHD. In many cases a lot of the books were focused on ADHD in children. Though the symptoms are similar there are some significant differences between adult and childhood ADHD. As this condition only develops in the childhood years, it is a different problem to solve when it is not discovered until the person is an adult.