Eventide - Quests of Shadowind, #7

The Door to Life Is the Maw of Death. An unstoppable Nulenac conveyer ship has entered Earth's solar system to claim its prize of human meat and slaves. As it rockets unerringly toward Shadowind, Logan and Mindy march resolutely on the final leg of their journey to rescue their parents. Or is their attempt merely a funeral procession leading to hungry graves?The only way to reach Mesa Island is through the infested streets of Dungeontomb.
But the path taking them there is as twisted as their enemies' plots to subvert and shed blood. Before the teen siblings can even decipher its hidden entrance, murderous aliens, killer creatures, and deadly dark spirits ruthlessly shadow their every step. With the help of steadfast friends, Logan and Mindy trek onward, never knowing if they're climbing a mesa of miracles, or descending an abyss of abomination.