http://file.allitebooks.com/20151105/Hacking%20Basic%20Security,%20Penetration%20Testing%20and%20How%20to%20Hack.pdf
http://file.allitebooks.com/20161127/Penetration%20Testing%20with%20the%20Bash%20shell.pdf
http://file.allitebooks.com/20160820/Penetration%20Testing%20Basics.pdf
http://file.allitebooks.com/20170710/Effective%20Python%20Penetration%20Testing.pdf
http://file.allitebooks.com/20170310/Advanced%20Penetration%20Testing%20for%20Highly-Secured%20Environments,%20Second%20Edition.pdf