After a fierce battle on her home planet, Ketro Mons decides to join her friend, Flex-a-girl, on a vacation to the Sun. Joined by Hixtel, her cousin, Ketro accompanies Felicity to her hometown of Simplaiya, where more adventure, chaos, and action awaits. Lately there have been attacks on the Solar System by Mercury demons, which are the savage inhabitants of Mercury. What part will they play in the trio's adventures? How long will it be until Magma Man and Lava Lad show up again? And what worse could happen? This is the fourth and final book in the Olympus Mons Saga. Please check out my other books! It is advisable to read them before this one. #1- NO MORE MAGMA! #2- RISING LAVA #3- ERUPTION