In 2021, NASA plans to launch a 12 year mission to explore the Trojan asteroids of Jupiter. Trojans are asteroids that follow a planet's orbital path in within one of that planet's Lagrange points. Several planets in our solar system are known to have Trojans; Earth has one and Neptune has them.
My second book, Trojan, is about the Trojan asteroids of Neptune and their exploration.
The Kindle version may be found here:
Trojan: The Black Chronicles, Book II