The following is not an exhaustive list. Rather, it is a starting point for anyone who wants to study giftedness and gifted people. Even if you directly consult with a specialist, you will find the following books and journals helpful.
Dr. Ruf's Book
(2005) (formerly titled Losing Our Minds: Gifted Children Left Behind). 5 Levels of Gifted, published by Great Potential Press, combines four years of data gathering from 50 families with nearly 30 years of research and experience in the field of giftedness, individual differences, and high intelligence. The book is aimed primarily at parents and vividly describes the upper 10 to 15 percent of the intellectual continuum in human beings from birth to adulthood as manifested in their behaviors, thoughts, accomplishments, and test scores. She introduces the concept of Levels of Giftedness and makes it very clear how many factors contribute to a person's intellectual levels and achievement. Learn more or buy now.