Yu has published many essays and written quite a number of books on psychology and parenting, including Doctoring the Soul, Treating the Heart with Heart, Childhood Only Comes Once, Raising Happy Children, Being a Guide to Kids, and No Kid is an Island.
具有心理學背景、以親子教育聞名的游乾桂，曾出版不少散文、心理學、親職教育類書籍，如：《心靈醫師》、《用心療心》、《孩子只有一個童年》、《培養快樂的孩子》、《做孩子的生活大師》、《別讓童心去流浪》等等。