II John is a term that refers to a book of the Bible. It is also known as the Second Epistle of John. The book is a short letter written by the apostle John to a group of Christians. It follows the format of a typical letter, with an opening greeting, a body of text, and a closing statement. Some synonyms for II John include 2 John, Second John, and the Second Epistle of John. Regardless of what it is called, the book is known for its emphasis on love and hospitality, as well as its warning against false teachers and teachings.