The Alien Encounter.
Some good titles could be 'The Alien Encounter', 'Alien Invasion: Earth's Last Stand', 'Among the Aliens'.
Some more titles for alien stories are 'Alien Technology: Beyond Our Comprehension'. This title makes the reader curious about what kind of advanced technology aliens might possess. 'The Lost Alien Tribe' could be a story about a group of aliens that have been cut off from the rest of their kind. And 'Alien Shadows: The Unseen Threat' is a great title as it creates a sense of mystery and danger associated with aliens that we can't fully see.
A good love story book title is 'Outlander'. It combines time - travel and a passionate love story. Then there's 'Me Before You', which is a heart - wrenching love story about a young woman and a quadriplegic man. 'Wuthering Heights' is also a famous one. It shows a complex and intense love between Heathcliff and Catherine, full of passion and revenge.
I think 'Echoes of Love' or 'Love's Secret Pathways' would work well. The first one implies the lasting impact of love, and the second suggests the mysterious and unexpected aspects of a love story.
Some good titles could be 'Vampire's Heart of Love', 'Love Bites: A Vampire Romance', 'The Vampire's Beloved'.
One popular 'alien invasion novel' is 'War of the Worlds' by H.G. Wells. It's a classic that vividly depicts the invasion of Earth by Martians. Another is 'The Invasion of the Body Snatchers' which has a unique concept of aliens taking over human bodies in a rather insidious way. And 'Footfall' is also well - known, presenting an intense story of an alien invasion and humanity's fight against it.
Some good titles could be 'A Love Beyond Time', 'The Heart's Secret Desire', 'Love in the Moonlight'. These titles are catchy and give a sense of the romantic nature of the stories.
One good title for a sad story is 'Where the Red Fern Grows'. It tells a heartbreaking story about a boy and his two hunting dogs. 'Night' is also a sad title for a book that details the horror and sadness of the Holocaust. And 'Bridge to Terabithia' is a sad story of friendship and loss, and the title itself has a certain melancholy air to it.
A really interesting title is 'Wolf Hall' by Hilary Mantel. This novel is about Thomas Cromwell in the court of Henry VIII. It gives a vivid portrayal of the Tudor period with all its political intrigue and complex characters.