The 2012 EHDI E-Book is now available. In keeping with the intention of providing a comprehensive, timely reference for EHDI, you will find several new sections, as well as revisions and updates to much of the material from the last edition. This eBook represents the collective wisdom of many of the experts most actively involved in EHDI. By having the publication available on our website, you can refer to it as necessary and direct others to the link whenever you feel it might be helpful.