Could you point me to a source that has longer explanation about the sum of two numbers found on page 4? I am missing something. It has been a long time since I did algebra, but the sum of two odd numbers is 2(n+m+1)? If I assign two odd numbers n=3 and m=5. The sum is 8. Using your equation 2(3+5+1) = 18. I assume the mathematics is some sort of proof for all numbers, but it has been a very long time since I took math and it is very hazy. A pointer to another source would be enough. Proving this point is not important to this book, but it would help those people who haven't taken a math course in 40 years.
I am only into the book a few pages, but after reviewing the material, I am very interested in seeing the next chapters.
