About Elfi Schlegel Elfi Schlegel and Claire Ross Dunn Books by Elfi Schlegel The Gymnastics Book The Young Performer's Guide to Gymnastics by (author) Elfi Schlegel & Claire Dunn Ages 7 to 11 Grades 2 to 6 The Gymnastics Book A Young Person's Guide To Gymnastics by (author) Elfi Schlegel & Claire Ross Dunn