Almost halfway through the above mentioned book and it's got some good tips for managing a busy instructor life, IMHO. Obviously, there are far more subjects covered later in the book but so far so good, although at my pre-FI rating stage I feel it's probably more a book for consumption once I've achieved the FI rating as opposed to now, contrary to what the advertising suggested. However, the second half of the book might render that last comment inaccurate so stay tuned....
Marks out of 10? 8/10 so far - and this is based purely on how it has got me thinking with an instructors mindset (note to oneself: I really should start making notes as I progress through it!).
VFE.