I mainly use Word, Outlook and Onenote (with the occasional spreadsheet in Excel), to me this book was let down by the fact the entire section on Onenote 2013 consists of a whole meagre paltry 2 pages! Seriously, you get far better information just by opening Onenote and looking at the tooltips. I couldn't quite believe it to be honest. Surely Onenote has long since developed into a mature and integral part of the Office experience and deserves far more than in-depth coverage in this sort of guide?
Other than that, the book is a nicely presented and user friendly (Beginner-Intermediate level) overview to Office 2013. The format for this series is simple: it gives a colourful overview of much of the software (usually a paragraph of information, a list of instructions and helpful pictures, with a few tip boxes etc.), giving no more than 2 pages on each topic (meaning you can get the information you need quickly and then get back to working). It is also good for skimming through and reading the parts you need to get a better all round understanding of how everything works. You won't become an Office "jedi" using this book, but you will become stronger and more efficient all round. It is also ideal for those with little experience of the main Office programs.
It is just a pity that it isn't the definitive guide. I will still keep it, for improving my knowledge of Office, but it looks like (being as I'm a completest freak) I will have to shell out again for a book on Onenote also (I see there is a dummies guide and a "plain and simple" book for it).