This book is excellent! I took the 4 day course from MTMI in WI, which was a great start, but the material covered wasn't everything on the Registry.
I used the 6 page outline provided by the ARRT, called Content Specifications for the Examination in Mammography, to guide my studying.
Because this book has an Index in the back, I was able to quickly look up the topics mentioned on the ARRT outline. I was shocked and delighted that the format of the book and heading titles closely match that on the outline! It made studying very easy.
As the title suggests, the content of the book is 'just the facts'. At the beginning of each chapter are vocab words with detailed descriptions. The text that follows includes diagrahms, photos, and tables. The end of the chapter has review questions with detailed answers in the back of the book. I was dissapointed that it didn't have mock registry questions, but it turns out that wasn't necessary.
This book has everything you need. Unlike x-ray school, learning this modality was all self-directed. I could have never passed the test (92%) w/o this book and the MTMI workshop!