Recommended reading - Star Trek: Voyager: Flashback (1996):

Star Trek: Voyager: Flashback

By Diane Carey & Brannon Braga.

Published by Pocket Books.
Published 1996.
First Edition.
Paperback.
ISBN-10: 0671003836
ISBN-13: 978-0671003838

Description:

When Tuvok is haunted by recurring memories of the time he spent under the command of Captain Hikaru Sulu, Captain Janeway follows him to the century-old bridge of the starship Excelsior during a desperate battle.