A novel written in form of a letter is said to be_______

The correct answer is "epistolary." An epistolary novel is a novel written in the form of a series of letters or diary entries. The letters are often written by one or more of the characters in the novel, and they can be addressed to other characters in the novel, or to people outside the novel. The form of the letters allows the reader to see events from multiple perspectives and can create a more intimate relationship between the reader and the characters. One famous example of an epistolary novel is "Dracula" by Bram Stoker. The novel is made up of a series of letters, diary entries, and newspaper articles, all written by different characters in the novel. The use of letters and diary entries allows the reader to experience the horror of the novel through the eyes of the characters, and creates a sense of immediacy and urgency. Epistolary novels have been popular for centuries, and the form has been used to tell a wide variety of stories, from gothic horror to romantic comedy. Some other examples of epistolary novels include "The Color Purple" by Alice Walker, "Pamela" by Samuel Richardson, and "The Screwtape Letters" by C.S. Lewis.