Too many uncorrected exercises

Yes, the exercises are of a good standard, but unfortunately those who do not find response will be disappointed because most of the exercises are not corrected. And sometimes, the correction is expeditious.

In the end, this book is intended to complement the other book of the author (www.Amazon.com/gp/product/2729876391/), but I found the rather steep bill for a result not so convincing. Because you have to buy 2 pounds to almost 20 for something incomplete.
And that's not counting the fact that the mathematical specialty program is not even addressed.

So an interesting book, but too expensive for the promise he does not hold.