Complex sentence: The United Kingdom version of the book has had certain factors of the book removed, the most notable were the headbutt to the ovaries and the back-breaker sections of the first chapter (A-Ass-kicking).
Split into simpler sentences: The United Kingdom edition of the book has had certain factors of the book removed. The most notable changes were the removal of the "headbutt to the ovaries" and the "back-breaker" sections from the first chapter (A-Ass-kicking).