The author, Ruscoe knew Rees Howells and was part of the Bible College of Wales for many decades beginning in the late 30s and so wrote from what she saw.
There are some facts in here which are not found in Norman Grubbs book which is the classic on Rees Howells, but this book by Ruscoe falls short on Grubbs book.
Whilst the section on intercession was good i felt that there was to few Bible examples which weakened the book, but this may have been space limitations. ReesHowells dot com talks more about the man and his ministry with some rare photos.
In many ways this book is very similar to Grubbs book (quotes from him as well and why not), though not as good, but nonetheless still worth reading.