Follow that up with his slightly more advanced <i>The Art of Insight in Science and Engineering</i> [0].<p>I feel like these two books plus Art Benjamin's <i>Secrets of Mental Math</i> [1] would put your Fermi calculation abilities on another level.<p>[0] <a href="https://mitpress.mit.edu/books/art-insight-science-and-engineering" rel="nofollow">https://mitpress.mit.edu/books/art-insight-science-and-engin...</a>
free download of the book (for the lazy):
<a href="https://mitpress.mit.edu/sites/default/files/titles/free_download/9780262514293_Street_Fighting_Mathematics.pdf" rel="nofollow">https://mitpress.mit.edu/sites/default/files/titles/free_dow...</a><p>Mahajan also offers paperback and ebook options.
Link to Archived Course on EdX.<p><a href="https://www.edx.org/course/street-fighting-math-mitx-6-sfmx" rel="nofollow">https://www.edx.org/course/street-fighting-math-mitx-6-sfmx</a>
This was easily my favorite course at MIT, and there were a lot I liked.<p>In fact, I liked this course so much that the CTF team I started back in college was named "The Art of Approximation in Science and Engineering," the name of the course taught by this professor / that used this book.<p>Highly recommend.
This is a very good book to refine tactical approaches to several classes of math problems. I read it last year and, at the time, I wished I had come upon it sooner.
There is also a class at MIT under the same name: <a href="http://ocw.mit.edu/courses/mathematics/18-098-street-fighting-mathematics-january-iap-2008/" rel="nofollow">http://ocw.mit.edu/courses/mathematics/18-098-street-fightin...</a>
The course was also presented on edX:
<a href="https://www.edx.org/course/street-fighting-math-mitx-6-sfmx" rel="nofollow">https://www.edx.org/course/street-fighting-math-mitx-6-sfmx</a><p>you can enroll and view the archives.
The problem is not math. The problem is not fighting. The problem is not the street. The problem is ego. Until you lose yours, you will not grasp logic.