I saw only one mention of Book 1 in
John Ringo's Black Tide Rising Series so I want to take time to recommend the whole series:
Under a Graveyard Sky
To Sail a Darkling Sea
Islands of Rage and Hope
Strands of Sorrow
Description for book 1:
Zombies are real. And we made them. Are you prepared for the zombie apocalypse? The Smith family is, with the help of a few marines.
When an airborne “zombie” plague is released, bringing civilization to a grinding halt, the Smith family, Steven, Stacey, Sophia and Faith, take to the Atlantic to avoid the chaos. The plan is to find a safe haven from the anarchy of infected humanity. What they discover, instead, is a sea composed of the tears of survivors and a passion for bringing hope.
For is up to the Smiths and a small band of Marines to somehow create the refuge that survivors seek in a world of darkness and terror. Now with every continent a holocaust and every ship an abattoir, life is lived beneath a graveyard sky.
I am a fan of much (but not all) of Ringo's work and a huge fan of his publisher, Baen. I REALLY enjoyed it. I highly recommend.