Reddit reviews DK Essential Managers: Improving Your Memory

This is the book I have. But maybe not the same edition specifically, of course.

I personally haven't managed to ever use all the techniques in it, in good part because of the anxiety/focus issue myself, but learning some of the things in it about memory has been extremely helpful anyway, especially optimal times to memorise key bits of information.

The mind palace for instance is something I struggle with, even though I have a good baseline visual and physical memory. My oldest brother can use it quite well, as I understand. Part of the reason I struggle with it may be that my colour memory can be a bit off. (If you wore a red t-shirt I might incorrectly remember that it was green, a day later, and be quite surprised at myself)

Overall, I found it to be helpful anyway and I would recommend the book to anyone, just because we all have to use our memory, and we're not really born knowing how to best make use of it, at times.

Edit: Oh, and I'd like to add, that like the "for dummies" series of books (which is usually decent too) there's a few other books in this series that are good; but by comparison, with this series, it's a small sized book, so it shouldn't feel like a chore to read it!