I have been given Journey Back to Eden recently by Fr. Simon, I read the book in three days, (could not put it down), and will re read it again in the next few weeks. As you mentioned it is not a long read, and written by a monk from the Catholic Church who tells the reader 'of a Christianity most of us barely know'. I myself along with a few other people will experience first hand some of the monasteries featured in this book when we visit Egypt for Pentecost with +Seraphim in May. Like Mark Gruber OSB the author, I intend to keep a short spiritual journey of my visit and of the places that we visit.
I would highly recommend this book to anyone entering Orthodoxy, or anyone interested in Monasticism and the early Christian Monasteries and Desert Fathers.
I would also like to see this book added to a book club for review, and certainly added to the BOC Library.