This is the best of the Yod explanation I have come accross. Very detailed and accurate. Karen Hanamaker-Zondag is an excellent writer and obviously lived these dynamics herself. A big thank you to her. I have recommended this book to many who have Yods.
If you have a yod ... get this book! Gives a very detailed analysis of the yod configuration. From reading this book i gained an insight into and understanding of my own natal yods, that explained so much.