This is the *photographic facsimile reproduction - I would search out the TAN publisher's copy instead. You should be able to find the TAN version in fairly good supply as a used book, at a good price for the paperback (<$5-10)
About the book contents, as I wrote for my copy of the TAN edition:
Being a new convert to Christianity in the way of Catholicism, I have been swiftly ushered along the path of Divine knowledge, and just the last week was brought to this very book. First, I stumbled across the shorter "Appeal for Love" on newjerusalem's website, which was mainly about Sister Josefa's experiences in being shown Hell.
And then of course, I just had to have the full story and searched out this book. It's a little hard to come by in decent condition at a good price. But, those same Divine forces helped me find a copy for about $6 (used paperback in good condition.)
This work is truly inspired and insightful. If you really want to know what God/Jesus requires, how He requires it, His intentions, and the rewards of obedience and Grace (or, in the case of those who damn themselves, the terrible consequences), this book is essential. I can't begin to praise it highly enough (much like words trying to praise God Himself and being wholly inadequate.)
As I've been discovering, as we are able to bear the lessons, the gateways open before us and we are shown ever deeper levels of meaning and grandness. Our poor little brains can't really comprehend the concept of infinity, but nothing less than infinite is God and His Love for us poor creatures.
If you've been graced with coming across this work, you should feel duly privileged. Embrace it in the knowledge of how special you are to have been shown this work. Read it, and grow in understanding God's Love and Plan. :)
Thank you Sister Josefa for showing us more of the Sacred Heart of Jesus - truly you are among the blessed.