I really like this book. Many times I have compared it to Design for Hackers. I would say they are really similar in way of making design more approachable. Of course "Presentation Zen Design" is more about using design in context of slides but most of the rules are the same in every context.
After reading it I have good review-like feeling. It refreshed my knowledge from "Design for Hackers". I really liked Japanese and 'Zen' references in a book. It is really astonishing how 'Zen' art forms and rules can inspire our own presentations and designs.
One thing to remember: "Rule of Thirds".
Basically in every aspect of art, design or photography if you put your subject in the center it will look boring. If you put main subject in 1/3 on the right or left then it will look much more professional. That's it.