Gr 4-7-Introductory biographies of two computer geniuses. Both begin by placing the subjects in their historical and cultural milieus and include interesting anecdotes. Berners-Lee comes across as a humble man who changed our lives when he developed the World Wide Web. However, he has not accumulated great personal wealth from his seminal work. Gaines uses many quotes from her subject's book, Weaving the Web (Harper, 1999). Her title is similar in scope to Melissa Stewart's Tim Berners-Lee: Inventor of the World Wide Web (Ferguson, 2001). Riddle and Whiting describe Wozniak's successes as well as the challenges he faced after he cofounded Apple Computer. He has used his great wealth to give back to the community through philanthropy and teaching in elementary schools. The book is less detailed than Martha Kendall's Steve Wozniak (Highland, 2000). Both volumes define new words in reader-friendly terms within the text. Black-and-white captioned photos appear throughout. Useful for reports.-Sandra L. Doggett, Urbana High School, Ijamsville, MD Copyright 2001 Cahners Business Information.