Although quite diverse, there is not necessarily the particular example that would suit us.
And the approach is somewhat short in each case. In fact rather than examples, these mini-exercise. So the problem is that not everything is revealed at the time of the year to allow time for reflection, but the solution does not say much more about why certain ways. In addition it is a bit boring to understand the notion of having to juggle between page in question and the solution page to understand what the author means ...
This book is rather well suited as exercises in course material.