The information presented on this site is but a general introduction to all there is to learn about Legg-Calvé-Perthes disease. More extensive education can be found at the following resources on the web.
These books also offer further helpful information on Legg-Calvé-Perthes disease.
The Parents' Guide to Perthes: Understanding Legg-Calvé-Perthes Disease by Charles T. Price, MD & Betsy Miller
Legg-Calvé-Perthes Disease by John Anthony Herring, MD