Omg RussBell, that's a lot of work, thank you very much!
So the themes are basically the piece configurations, or batteries without which checkmate can't be generally delievered. This approach is indeed very instructive and similar to adopted by Mikhail Tal in his Tal's Winning Chess Combinations. However, as is clear from pages you posted, the positions taken in the book are new and I have not seen before. I'll definitely try to get this and other books of the series too. Thank you once again
Front cover....