Spirit Walk, Book Two : Enemy of My Enemy (Star Trek: Voyager)
by Christie Golden
Star Trek Paperback ISBN/ITEM#: 0743492579
Date: 01 December, 2004 List Price $6.99 Amazon US / Amazon UK /
Captain Chakotay and his sister are captives of a renegade Changeling, who is working with the infamous Cardassian Crell Moset. Tom Paris and Harry Kim set out to find Chakotay and save the Starship Voyager from disaster, but only Chakotay's willingness to undertake a "spirit walk" can truly save them... or doom them all.
(Source: Star Trek)