Daud Sutton is director of the Thesaurus Islamicus Foundation's design studio Editio Electrum. He lives in England. Adam Tetlow is an artist and writer. He lives with his wife and three children in rural England. Lisa DeLong has a Ph.D. in the use of geometry in art. A native of Utah, she works in London and around the world promoting excellence in the traditional arts. Dr. Scott Olsen is one of the leading experts on the Golden Section, and an associate professor of philosophy at Central Florida Community College in Ocala, Florida. David Wade is a writer and artist, and the author of the previous Wooden Book, Li: Dynamic Form in Nature. He lives in Wales. Phoebe McNaughton is an industrial graphic designer and a painter. She lives in England.