Agency - Tablet of Destinies - Lynn Yvonne Moon - Bog

Devon Arvol returns to solve the mystery of a train that suddenly
appears in a small town with all passengers missing. Instead of the
important scientists and researchers, the train is filled with strange
symbols painted in pure gold. But what's haunting Devon is not so
much the missing passengers, but a child's bloody tennis shoe that
hangs in the engineering compartment.
The Agency returns to solve a mystery only to stumble onto an
ancient civilization that not only worships their Gods but lives with
them. Return with Devon Arvol and meet new agents and old as
they work together to save each other while fighting evil corruption
at its core.