Fathom 2: Child of Two Worlds(2001)
A novel by Michael Turner
From the depths they rose in search of the child of two worlds, she who walked among the air breathers but was part of another world, the world below. Her name is Aspen Matthews, and they showed her her heritage. But behind their concern lurked a darker agenda, a brewing war with mankind.
Used availability for Michael Turner's Fathom 2: Child of Two Worlds
April 2001 : UK Paperback