Open Book Fracture: One specific kind of pelvic fracture is known as an 'open book' fracture. This is often the result from a heavy impact to the groin (pubis), a common motorcycling accident injury. In this kind of injury, the left and right halves of the pelvis are separated at front and rear, the front opening more than the rear, i.e. like opening a book. Depending on the severity, this may require surgical reconstruction.