Can you name the missing words from the titles of these ‘Q’, ‘X’, ‘Y’ and ‘Z’ books?

Can you unscramble the titles of these works by Agatha Christie?

Can you name the novels in the BBC’s list of the top 20 of the 21st Century?

Can you name the novel in which these characters appear: Emily Brontë’s Wuthering Heights (W) or Jane Austen’s Pride and Prejudice (P)?

Can you name the top 30 characters mentioned in JRR Tolkien’s ‘The Hobbit’?