I bought this book with high hopes,currently being in the process of buying a property in Bulgaria. I was deeply disappointed. Much of the book contains bland generalisations and statements of the obvious. Much of it seemed to rely on the author's knowledge of Varna (a Black Sea coastal resort), which is no good to anyone buying a property in a ski resort, for example.
There was also blatant advertising for a foreign exchange company. I can only assume that the company helped fund the book.
I would estimate that less than 5% of the book is of any practical use, and much of that information can be obtained from a few internet searches. I am now nearing completion on my Bulgarian property purchase and this book has been of no assistance.