Thinking about thinking about chess

While there are a huge number of books that tell you how to play chess, there are very few books on how to think about chess. "Think like a Grandmaster" by Kotov is certainly the most known, while Silman's "Reassess your Chess" is a more modern example.
To this list I can certainly recommend the addition of "Teach yourself Better Chess" by William Hartston. While the book appears to be a standard "Improve your chess" kind of book, it is in fact filled with a a huge amount of advice to improve your thinking. In fact most of the advice is designed to challenge "lazy thinking" and "accepted wisdom", which is hardly surprising, given Hartston's background as a psychologist.
The book is divided into 3 categories (Basic, Advanced, Mastery) with 25 short chapters for each. Each chapter has a heading describing the problem, and then a fuller explanation. For example the chapter titled "Playing with Blinkers" contains the following observation. "Good ideas interfere with better ones". And to demonstrate the truth of this he provides the following example.
In the diagrammed position it is White to play and mate in how many?
Without giving the to much away I'll suggest that the obvious answer is probably incorrect.

So if you seem to have hit a brick wall in attempting to improve your chess, you might want to try working through "Teach yourself better chess".