I know there are a lot of DoD personnel on here and it seems most forget or never know that you have access to a LOT of free libraries and resources. Each service should have it's own access to Skillport and Books24x7, all DoD have access to a large library through DoD's MWR, online as well,
https://www.militaryonesourceeap.org/achievesolutions/en/militaryonesource/Content.do?contentId=27777.
I just wanted to share for those that didn't know (I just found out about Safari myself). This applies to contractors too.