"Because my parents were poor, I knew from a very early age that I would have to be self-reliant. Hence, in high school, I built a 2.3 million electron volt atom smasher, which helped me to get into Harvard. My parents did not understand at all what I was doing, but they realised it was important, and helped in any way they could. The atom smasher used up 22 miles [35km] of cooper wire, which my parents and I wound on the high-school football field over Christmas vacation."
The atom smasher consistently blew the fuses at his parents' home. But it also impressed atomic scientist Edward Teller, who arranged a scholarship at Harvard University for the young Kaku.
Later, one finds the quote
...tediously having to memorise Maxwell's eight hideous mathematical equations that describe electromagnetic fields
and one hopes these are the author's words not Kaku's. Presumably the author is trying to contrast Maxwell's original equations with that written in covariant form ala Kaluza-Klein, which shows up a few sentences further down.
Anyway, a bit more on string theory shows up, and some comments and quotes about Kaku's thoughts on God appear later.