Sun, the Earth, and Near-Earth Space: A Guide to the Sun-Earth System - Comprehensive Information on the Effects of Space Weather on Human Life, Climate, Spacecraft Progressive Management E-Book (epub) 23.07.2013

FEMA Document Series: Risk Assessment - A How-To Guide To Mitigate Potential Terrorist Attacks Against Buildings, Providing Protection to People and Buildings, Risk Management Series, FEMA 452 Progressive Management E-Book (epub) 20.06.2011

Apollo and America's Moon Landing Program: Stages to Saturn - A Technological History of the Apollo/Saturn Launch Vehicles (NASA SP-4206) - Official Saturn V Development History Progressive Management E-Book (epub) 18.11.2011