The main author of this book is Demetra George, a highly respected Astrologer, who started out following the psychological approach, then took up asteroids and then shifted to a traditional approach. She's now trying to synthesise both traditional and modern approaches.
This book was written in 2006, it has quite a lot that is non controversial and useful. There are also bits that are controversial, especially in relation to the Asteroids, which are not universally used. It's written from the then dominant approach, that of seeing Astrology as concerned primarily with psychology and personality rather than objective prediction of events. If this is what you are primarily interested in, you will find this book both informative and interesting.
All that I would ask is that you realise that Astrology extends beyond what is described in this book,(as is always the case with any introductory book), And there are different ways of looking at it than as an adjunct to psychology.