A novel conclusion is the ending of a book, which ties up all the loose ends and provides closure to the story. The crossword solutions for this term are IST (3 letters), ETTE (4 letters), EPILOG (6 letters), and EPILOGUE (8 letters). IST is an abbreviation for 'is', ETTE is a feminine suffix, EPILOG is a short speech or writing at the end of a literary work, and EPILOGUE is a section at the end of a book that serves as a conclusion.