By reading some negative reviews of this book on "concise" format/edition I would have felt discouraged to get it. At the same time I do understand that some of the readers could have no choice due to requirement of some classes.
I have so far read the first 2 chapters from the Kindle sample and I will shortly buy the full book.
I'd like to talk to the potential readers that are looking at this book not because they are forced to get it but because they are genuinely interested in it. I believe the authors are implying that the reader has knowledge of accounting. On the first or second chapter they mention "balance sheet" and I could follow easily because I did study programming for accounting at high school. Chapter 7 is about risk and it introduces variance and standard deviation: here as well my background should help since I have studied statistics at the university.
I would say that depending on educational background this book will end up being easier or harder to the reader. I'd say that a good background in math could help a lot even without previous knowledge of accounting or statistics. Either way, I repeat, you would need to know a bit of accounting (balance sheets, profit and loss, etc.). This can be achieved with simple searches on the internet: for example wiki on terms such as Financial_accounting and Double-entry_accounting_system.
Finally here some specific comments about the Kindle edition vs a regular paper edition. At first I found reading experience a bit awkward since I was accustomed to regular "entertainment" books with simple/plain layout. The original layout of this book is quite rich with charts, graphs. etc. and eventually I came to realize that overall the transposition from paper to electronic was well done. It could and it will improve with future editions however it is not something for which I would remove one star from the overall rate.
I found my good way to read it on my 7" device but I believe a 10" will offer a better experience.
I think I will go for the regular/full instead of "concise" edition since I understand there should be up updated coverage about risk with government bonds, specifically by reporting the recent example of Greece.