• Hammer's Slammers

-> https://www.amazon.com/Complete-Hammers-Slammers-Volumes-ebook/dp/B00APA1LSK/ref=sr_1_1?s=books&ie=UTF8&qid=1539152300&sr=1-1&keywords=hammer%27s+slammers

• Starship Troopers

-> https://www.amazon.com/Starship-Troopers-Robert-Heinlein-ebook/dp/B004EYTK2C/ref=sr_1_1?s=books&ie=UTF8&qid=1539152292&sr=1-1&keywords=starship+troopers

• Forever War

-> https://www.amazon.com/Forever-War-Book-ebook/dp/B00PI184XG/ref=sr_1_1?s=books&ie=UTF8&qid=1539152274&sr=1-1&keywords=forever+war

• Diaspora

-> https://www.drivethrurpg.com/product/79933/Diaspora

• 3:16

-> http://gregorhutton.com/boxninja/threesixteen/

• Stay Frosty

-> https://www.rpgnow.com/product/206742/Stay-Frosty

• Mothership

-> https://www.rpgnow.com/product/245017/Mothership-Players-Survival-Guide