Get the name right. It's, Father, Son, and Holy Spirit; Relationships, Roles and Relevance by Bruce A. Ware.
If you're looking for a book to open up the mysteries of the Trinity, that is easily understandable, and doesn't require a lot of thought, good luck. That book doesn't exist. If you want a better understanding of the Trinity that is reverent, worshipful, devotional, and applicable, then this is the book for you.
Bruce Ware begins by stating the importance of the doctrine of the Trinity. The doctrine of the Trinity is important because God has revealed Himself as Trinity. If it were not important it would not have been revealed in Scripture. The first chapter allso contains ten reasons for focusing on the Trinity.
In the second chapter Dr. Ware gives a brief statement concerning the histroical and biblical doctrine of the Trinity. As he does this he very aptly defends the historic position of One God, yet Three distinct Persons.
Cahpters 3, 4, and 5 then focus on each member of the Trinity in their distinctive relationships with each other, distinctive roles within the Godhead, and the relevance of each for mankind. Each of these chapters end with an application of the above stated doctrines.
Chapter six now applies the doctrine of the Trinity to our own relationships as we live together in communities (Families, friendships, workplaces, Churches, etc...).
I wholeheartedly recommend this book as an introduction into the meaning of the Trinitarian faith. While it is not meant to be a philosphical treatment of the Trinity, there is much here to be learned, and what we learn is given hands and feet, so that we can be doers, and not hearers only.