What caught my attention was a proof about 1 being greater than 0. due to the fact that

n square has to be greater than 0. and since 1 square = 1, then 1 is greater than 0.

Right now im reading Spivak and Apostol's introduction to basic math but I was wondering if there are books that deal with this kind of elementary proofs, can someone recommend me some?

I dont mean books about logic but about elementary math like the above mentioned. Im having a hard time finding any book about this subject.