A mathematical proof is a rigorous argument based on straightforward logical rules to convince other mathematicians that a statement is true. A minor deficiency in a proof can spoil the whole argument!
According to many math people, the best way to enjoy mathematics is by dealing with mathematical proofs. Furthermore, there are math people who fall in love with mathematical proofs.
Although learning and writing convincing proofs are not easy, you can learn the basic principles of writing proof from a helpful book. For that reason, we have curated more than sixty mathematical proofs books for you. But keep in mind that reading those books is not enough! You should also try to prove the theorems by yourself!