If you enjoy proofs, you'll enjoy Proofs from THE BOOK, a collection of beautiful proofs. The title of the book is an allusion to the notion by Paul Erdős that

If you enjoy proofs, you'll enjoy Proofs from THE BOOK, a collection of beautiful proofs. The title of the book is an allusion to the notion by Paul Erdős that God had a book with the most beautiful proofs. https://en.wikipedia.org/wiki/Proofs_from_THE_BOOK https://en.wikipedia.org/wiki/Proofs_from_THE_BOOK