An ACL tear is a common but serious knee injury. The decision of how to treat this injury is not an easy one. It requires understanding the damage in the knee, the treatment options available, and what to expect from these options. Whether you are active in sports or work in a job that requires a strong, stable knee, an ACL tear may have devastating consequences. Two medical professionals have written this eBook to help patients deal with this injury. Dr. Frank Noyes, an internationally renowned orthopaedic surgeon, and Sue Barber-Westin, Director of Clinical Research at the Cincinnati SportsMedicine Research Foundation, provide information that is easy to read and understand. Together, Noyes and Barber-Westin have conducted over 60 clinical studies and published 140 scientific articles. This eBook provides information on what the ACL does and why it is so important, whether to have surgery or not, how to prepare for surgery, and what to do the first week after surgery.