6 books in series

Osprey Adventures

Osprey Adventures is a 6-book series with 6 released primary works first released in 2010 with contributions by Joseph McCullough, Steve White, Kenneth Hite, David A. McIntee, Philip Smith, and Kennon Bauman.

The Nazi Occult
The Cthulhu Wars: The United States' Battles Against the Mythos
Steampunk Soldiers: Uniforms & Weapons from the Age of Steam
Dinosaur Hunter: The Ultimate Guide to the Biggest Game
We Will Destroy Your Planet: An Alien’s Guide to Conquering the Earth
Zombies: A Hunter's Guide