Introduction to the logic, value and differences of the Gonstead adjusting technique. Book 10 describes the Gonstead Chiropractic analysis and adjusting technique for ilium subluxations. Gonsteads’ Foundation Principles highlight the importance of an optimum foundation to the spine for each individual patient. Without a sound foundation, which incorporates effective mobility at both sacroiliac joints, many corrections to the spine will be ineffectual or at best, temporary. Pelvic bench and prone adjusting techniques are presented, including 3D videos for the key set-ups and hyperlinks to interactive 3D spin videos.