Crisis is a set of four routines using currency, Post-it notes, and a Sharpie. That's it. Minimalism at its best. Let's get right to the point, as the author candidly admits, that there's really nothing new here. And there isn't.
Game is a prediction of what the result of three rounds of "which hand" will be. Lots of people do this--and Marc Paul taught it on his classic, but now out-of-print, Mind2Mind DVD. Bothra does make fairly cool use of two Post-it notes for his MOs prediction. The technique, though, reminded me a lot of Gerard Zitta's somewhat similar "Janus."
Location is another effect done by a lot of mentalists. It kind of resembles the commercial effect Espionage in predicting the location of objects using a variation of the Free Will Principle by Deddy Corbuzier,,
O Dear is a Post-it note version of Dead or Alive. I've seen a similar routine on a Dan Harlan video, as well as in Julian Moore's epic masterpiece on all the things you can do with Post-it notes, Post-Justify.
4 Thoughts is a straight OA Mental Epic with four folded slips of paper. The only thing that I hadn't seen before was the force that he suggests for the fourth choice. It's different, but it's not necessarily better than what folks usually use.
Overall, this is not a bad little ebook. I do variations of all four of these routines because they are classics and pretty effective. Richard Osterlind's working of the OA principle used in 4 Thoughts is much superior, and the only way that I do that routine. The book comes with a short, somewhat error-ridden, but overall helpful MP4 file.